diff --git a/src/Math/RectangularMatrix.h b/src/Math/RectangularMatrix.h
index 56c65e66d..b7a2b846e 100644
--- a/src/Math/RectangularMatrix.h
+++ b/src/Math/RectangularMatrix.h
@@ -161,7 +161,7 @@ template<std::size_t cols, std::size_t rows, class T> class RectangularMatrix {
          * @see Vector::operator<(), Vector::operator<=(), Vector::operator>=(),
          *      Vector::operator>()
          */
-        inline constexpr bool operator!=(const RectangularMatrix<cols, rows, T>& other) const {
+        inline bool operator!=(const RectangularMatrix<cols, rows, T>& other) const {
             return !operator==(other);
         }
 
diff --git a/src/Math/Vector.h b/src/Math/Vector.h
index 97568a4cf..4be582d1f 100644
--- a/src/Math/Vector.h
+++ b/src/Math/Vector.h
@@ -197,7 +197,7 @@ template<std::size_t size, class T> class Vector {
         }
 
         /** @brief Non-equality comparison */
-        inline constexpr bool operator!=(const Vector<size, T>& other) const {
+        inline bool operator!=(const Vector<size, T>& other) const {
             return !operator==(other);
         }