diff --git a/src/Magnum/Math/Algorithms/KahanSum.h b/src/Magnum/Math/Algorithms/KahanSum.h
index 677bc782e..bec124556 100644
--- a/src/Magnum/Math/Algorithms/KahanSum.h
+++ b/src/Magnum/Math/Algorithms/KahanSum.h
@@ -29,7 +29,9 @@
  * @brief Function @ref Magnum::Math::Algorithms::kahanSum()
  */
 
-#include <utility> /* std::declval :( */
+/* std::declval() is said to be in <utility> but libstdc++, libc++ and MSVC STL
+   all have it directly in <type_traits> because it just makes sense */
+#include <type_traits>
 
 namespace Magnum { namespace Math { namespace Algorithms {
 
diff --git a/src/Magnum/Math/Bezier.h b/src/Magnum/Math/Bezier.h
index 2c6958f8f..007159350 100644
--- a/src/Magnum/Math/Bezier.h
+++ b/src/Magnum/Math/Bezier.h
@@ -30,6 +30,10 @@
  * @brief Class @ref Magnum::Math::Bezier, alias @ref Magnum::Math::QuadraticBezier, @ref Magnum::Math::QuadraticBezier2D, @ref Magnum::Math::QuadraticBezier3D, @ref Magnum::Math::CubicBezier, @ref Magnum::Math::CubicBezier2D, @ref Magnum::Math::CubicBezier3D
  */
 
+/* std::declval() is said to be in <utility> but libstdc++, libc++ and MSVC STL
+   all have it directly in <type_traits> because it just makes sense */
+#include <type_traits>
+
 #include "Magnum/Math/Vector.h"
 
 #ifdef MAGNUM_BUILD_DEPRECATED
diff --git a/src/Magnum/Math/BitVector.h b/src/Magnum/Math/BitVector.h
index a2bc0ad2a..990fe2b9d 100644
--- a/src/Magnum/Math/BitVector.h
+++ b/src/Magnum/Math/BitVector.h
@@ -30,6 +30,8 @@
  * @m_since_latest
  */
 
+/* std::declval() is said to be in <utility> but libstdc++, libc++ and MSVC STL
+   all have it directly in <type_traits> because it just makes sense */
 #include <type_traits>
 #include <Corrade/Containers/sequenceHelpers.h>
 #ifndef CORRADE_SINGLES_NO_DEBUG
diff --git a/src/Magnum/Math/Color.h b/src/Magnum/Math/Color.h
index da34ba31a..14ac592bc 100644
--- a/src/Magnum/Math/Color.h
+++ b/src/Magnum/Math/Color.h
@@ -29,6 +29,10 @@
  * @brief Class @ref Magnum::Math::Color3, @ref Magnum::Math::Color4, literal @link Magnum::Math::Literals::operator""_rgb() @endlink, @link Magnum::Math::Literals::operator""_rgba() @endlink, @link Magnum::Math::Literals::operator""_rgbf() @endlink, @link Magnum::Math::Literals::operator""_rgbaf() @endlink, @link Magnum::Math::Literals::operator""_srgb() @endlink, @link Magnum::Math::Literals::operator""_srgba() @endlink, @link Magnum::Math::Literals::operator""_srgbf() @endlink, @link Magnum::Math::Literals::operator""_srgbaf() @endlink
  */
 
+/* std::declval() is said to be in <utility> but libstdc++, libc++ and MSVC STL
+   all have it directly in <type_traits> because it just makes sense */
+#include <type_traits>
+
 #include "Magnum/Math/Matrix.h"
 #include "Magnum/Math/Packing.h"
 #include "Magnum/Math/Vector4.h"
diff --git a/src/Magnum/Math/Complex.h b/src/Magnum/Math/Complex.h
index db49d46dc..10817445e 100644
--- a/src/Magnum/Math/Complex.h
+++ b/src/Magnum/Math/Complex.h
@@ -29,6 +29,9 @@
  * @brief Class @ref Magnum::Math::Complex, function @ref Magnum::Math::dot(), @ref Magnum::Math::angle()
  */
 
+/* std::declval() is said to be in <utility> but libstdc++, libc++ and MSVC STL
+   all have it directly in <type_traits> because it just makes sense */
+#include <type_traits>
 #ifndef CORRADE_SINGLES_NO_DEBUG
 #include <Corrade/Utility/Debug.h>
 #endif
diff --git a/src/Magnum/Math/Dual.h b/src/Magnum/Math/Dual.h
index d77d24fc2..5d49e8891 100644
--- a/src/Magnum/Math/Dual.h
+++ b/src/Magnum/Math/Dual.h
@@ -29,6 +29,9 @@
  * @brief Class @ref Magnum::Math::Dual
  */
 
+/* std::declval() is said to be in <utility> but libstdc++, libc++ and MSVC STL
+   all have it directly in <type_traits> because it just makes sense */
+#include <type_traits>
 #include <Corrade/Containers/Pair.h>
 #ifndef CORRADE_SINGLES_NO_DEBUG
 #include <Corrade/Utility/Debug.h>
diff --git a/src/Magnum/Math/DualComplex.h b/src/Magnum/Math/DualComplex.h
index 839a176ee..a6fd74242 100644
--- a/src/Magnum/Math/DualComplex.h
+++ b/src/Magnum/Math/DualComplex.h
@@ -30,6 +30,10 @@
  * @brief Class @ref Magnum::Math::DualComplex
  */
 
+/* std::declval() is said to be in <utility> but libstdc++, libc++ and MSVC STL
+   all have it directly in <type_traits> because it just makes sense */
+#include <type_traits>
+
 #include "Magnum/Math/Complex.h"
 #include "Magnum/Math/Dual.h"
 #include "Magnum/Math/Matrix3.h"
diff --git a/src/Magnum/Math/DualQuaternion.h b/src/Magnum/Math/DualQuaternion.h
index 7bf1cff92..c5c77e9f3 100644
--- a/src/Magnum/Math/DualQuaternion.h
+++ b/src/Magnum/Math/DualQuaternion.h
@@ -30,6 +30,9 @@
  * @brief Class @ref Magnum::Math::DualQuaternion, function @ref Magnum::Math::sclerp()
  */
 
+/* std::declval() is said to be in <utility> but libstdc++, libc++ and MSVC STL
+   all have it directly in <type_traits> because it just makes sense */
+#include <type_traits>
 #include <Corrade/Utility/StlMath.h>
 
 #include "Magnum/Math/Dual.h"
diff --git a/src/Magnum/Math/Frustum.h b/src/Magnum/Math/Frustum.h
index 7c8554549..b70d5b4e6 100644
--- a/src/Magnum/Math/Frustum.h
+++ b/src/Magnum/Math/Frustum.h
@@ -30,6 +30,9 @@
  * @brief Class @ref Magnum::Math::Frustum
  */
 
+/* std::declval() is said to be in <utility> but libstdc++, libc++ and MSVC STL
+   all have it directly in <type_traits> because it just makes sense */
+#include <type_traits>
 #include <Corrade/configure.h>
 #ifndef CORRADE_SINGLES_NO_DEBUG
 #include <Corrade/Utility/Debug.h>
diff --git a/src/Magnum/Math/FunctionsBatch.h b/src/Magnum/Math/FunctionsBatch.h
index b0a6bdfca..954df2ec6 100644
--- a/src/Magnum/Math/FunctionsBatch.h
+++ b/src/Magnum/Math/FunctionsBatch.h
@@ -30,6 +30,9 @@
  */
 
 #include <initializer_list>
+/* std::declval() is said to be in <utility> but libstdc++, libc++ and MSVC STL
+   all have it directly in <type_traits> because it just makes sense */
+#include <type_traits>
 #include <Corrade/Containers/StridedArrayView.h>
 
 #include "Magnum/Math/Functions.h"
diff --git a/src/Magnum/Math/Matrix.h b/src/Magnum/Math/Matrix.h
index 0cd84b2f5..aeab958de 100644
--- a/src/Magnum/Math/Matrix.h
+++ b/src/Magnum/Math/Matrix.h
@@ -29,6 +29,10 @@
  * @brief Class @ref Magnum::Math::Matrix, alias @ref Magnum::Math::Matrix2x2, @ref Magnum::Math::Matrix3x3, @ref Magnum::Math::Matrix4x4
  */
 
+/* std::declval() is said to be in <utility> but libstdc++, libc++ and MSVC STL
+   all have it directly in <type_traits> because it just makes sense */
+#include <type_traits>
+
 #include "Magnum/Math/RectangularMatrix.h"
 
 namespace Magnum { namespace Math {
diff --git a/src/Magnum/Math/Matrix3.h b/src/Magnum/Math/Matrix3.h
index 3a46c8218..c37d31738 100644
--- a/src/Magnum/Math/Matrix3.h
+++ b/src/Magnum/Math/Matrix3.h
@@ -29,6 +29,10 @@
  * @brief Class @ref Magnum::Math::Matrix3
  */
 
+/* std::declval() is said to be in <utility> but libstdc++, libc++ and MSVC STL
+   all have it directly in <type_traits> because it just makes sense */
+#include <type_traits>
+
 #include "Magnum/Math/Matrix.h"
 #include "Magnum/Math/Vector3.h"
 
diff --git a/src/Magnum/Math/Matrix4.h b/src/Magnum/Math/Matrix4.h
index 3dfc7b778..5cd930cb4 100644
--- a/src/Magnum/Math/Matrix4.h
+++ b/src/Magnum/Math/Matrix4.h
@@ -29,6 +29,10 @@
  * @brief Class @ref Magnum::Math::Matrix4
  */
 
+/* std::declval() is said to be in <utility> but libstdc++, libc++ and MSVC STL
+   all have it directly in <type_traits> because it just makes sense */
+#include <type_traits>
+
 #include "Magnum/Math/Matrix.h"
 #include "Magnum/Math/Vector4.h"
 
diff --git a/src/Magnum/Math/Quaternion.h b/src/Magnum/Math/Quaternion.h
index 75bc7e608..da130dec0 100644
--- a/src/Magnum/Math/Quaternion.h
+++ b/src/Magnum/Math/Quaternion.h
@@ -30,6 +30,9 @@
  * @brief Class @ref Magnum::Math::Quaternion, function @ref Magnum::Math::dot(), @ref Magnum::Math::halfAngle(), @ref Magnum::Math::lerp(), @ref Magnum::Math::slerp()
  */
 
+/* std::declval() is said to be in <utility> but libstdc++, libc++ and MSVC STL
+   all have it directly in <type_traits> because it just makes sense */
+#include <type_traits>
 #ifndef CORRADE_SINGLES_NO_DEBUG
 #include <Corrade/Utility/Debug.h>
 #endif
diff --git a/src/Magnum/Math/Range.h b/src/Magnum/Math/Range.h
index d98f34a30..1c19661ab 100644
--- a/src/Magnum/Math/Range.h
+++ b/src/Magnum/Math/Range.h
@@ -29,6 +29,10 @@
  * @brief Class @ref Magnum::Math::Range, @ref Magnum::Math::Range2D, @ref Magnum::Math::Range3D, alias @ref Magnum::Math::Range1D
  */
 
+/* std::declval() is said to be in <utility> but libstdc++, libc++ and MSVC STL
+   all have it directly in <type_traits> because it just makes sense */
+#include <type_traits>
+
 #include "Magnum/Math/Functions.h"
 #include "Magnum/Math/Vector3.h"
 
diff --git a/src/Magnum/Math/RectangularMatrix.h b/src/Magnum/Math/RectangularMatrix.h
index 1a46a2d91..55a2472c3 100644
--- a/src/Magnum/Math/RectangularMatrix.h
+++ b/src/Magnum/Math/RectangularMatrix.h
@@ -29,6 +29,10 @@
  * @brief Class @ref Magnum::Math::RectangularMatrix, alias @ref Magnum::Math::Matrix2x3, @ref Magnum::Math::Matrix3x2, @ref Magnum::Math::Matrix2x4, @ref Magnum::Math::Matrix4x2, @ref Magnum::Math::Matrix3x4, @ref Magnum::Math::Matrix4x3
  */
 
+/* std::declval() is said to be in <utility> but libstdc++, libc++ and MSVC STL
+   all have it directly in <type_traits> because it just makes sense */
+#include <type_traits>
+
 #include "Magnum/Math/Vector.h"
 
 namespace Magnum { namespace Math {
diff --git a/src/Magnum/Math/Vector.h b/src/Magnum/Math/Vector.h
index a057d99f5..2fd026214 100644
--- a/src/Magnum/Math/Vector.h
+++ b/src/Magnum/Math/Vector.h
@@ -29,6 +29,9 @@
  * @brief Class @ref Magnum::Math::Vector, function @ref Magnum::Math::dot(), @ref Magnum::Math::angle()
  */
 
+/* std::declval() is said to be in <utility> but libstdc++, libc++ and MSVC STL
+   all have it directly in <type_traits> because it just makes sense */
+#include <type_traits>
 #include <Corrade/Containers/Pair.h>
 #ifndef CORRADE_SINGLES_NO_DEBUG
 #include <Corrade/Utility/Debug.h>
diff --git a/src/Magnum/Math/Vector2.h b/src/Magnum/Math/Vector2.h
index 3653a0445..452c35214 100644
--- a/src/Magnum/Math/Vector2.h
+++ b/src/Magnum/Math/Vector2.h
@@ -29,6 +29,10 @@
  * @brief Class @ref Magnum::Math::Vector2, function @ref Magnum::Math::cross()
  */
 
+/* std::declval() is said to be in <utility> but libstdc++, libc++ and MSVC STL
+   all have it directly in <type_traits> because it just makes sense */
+#include <type_traits>
+
 #include "Magnum/Math/Vector.h"
 
 namespace Magnum { namespace Math {
diff --git a/src/Magnum/Math/Vector3.h b/src/Magnum/Math/Vector3.h
index 2ef697c37..3b44d4d2b 100644
--- a/src/Magnum/Math/Vector3.h
+++ b/src/Magnum/Math/Vector3.h
@@ -29,6 +29,10 @@
  * @brief Class @ref Magnum::Math::Vector3, function @ref Magnum::Math::cross()
  */
 
+/* std::declval() is said to be in <utility> but libstdc++, libc++ and MSVC STL
+   all have it directly in <type_traits> because it just makes sense */
+#include <type_traits>
+
 #include "Magnum/Math/Vector2.h"
 
 namespace Magnum { namespace Math {
diff --git a/src/Magnum/Math/Vector4.h b/src/Magnum/Math/Vector4.h
index c48d4c529..40efff750 100644
--- a/src/Magnum/Math/Vector4.h
+++ b/src/Magnum/Math/Vector4.h
@@ -29,6 +29,10 @@
  * @brief Class @ref Magnum::Math::Vector4, function @ref Magnum::Math::planeEquation()
  */
 
+/* std::declval() is said to be in <utility> but libstdc++, libc++ and MSVC STL
+   all have it directly in <type_traits> because it just makes sense */
+#include <type_traits>
+
 #include "Magnum/Math/Vector3.h"
 
 namespace Magnum { namespace Math {