diff --git a/src/Magnum/Magnum.h b/src/Magnum/Magnum.h
index b9335ceed..deba6a7c5 100644
--- a/src/Magnum/Magnum.h
+++ b/src/Magnum/Magnum.h
@@ -48,12 +48,6 @@ typedef unsigned int GLenum; /* Needed for *Format and *Type enums */
 
 namespace Magnum {
 
-namespace Math {
-    #ifndef DOXYGEN_GENERATING_OUTPUT
-    template<class> struct Constants;
-    #endif
-}
-
 /* Bring whole Corrade namespace */
 using namespace Corrade;
 
diff --git a/src/Magnum/Math/Math.h b/src/Magnum/Math/Math.h
index 5af08c63e..d735a39b7 100644
--- a/src/Magnum/Math/Math.h
+++ b/src/Magnum/Math/Math.h
@@ -41,7 +41,7 @@ namespace Magnum { namespace Math {
 #ifndef DOXYGEN_GENERATING_OUTPUT
 template<std::size_t> class BoolVector;
 
-/* Class Constants used only statically */
+template<class> class Constants;
 
 template<class> class Complex;
 template<class> class Dual;