diff --git a/glm/gtx/color_space.inl b/glm/gtx/color_space.inl
index ed39c0a94..b3183b981 100644
--- a/glm/gtx/color_space.inl
+++ b/glm/gtx/color_space.inl
@@ -1,6 +1,7 @@
 /// @ref gtx_color_space
 
 #include <glm/ext/scalar_relational.hpp>
+#include <glm/ext/scalar_constants.hpp>
 
 namespace glm
 {
diff --git a/test/gtx/gtx_color_space.cpp b/test/gtx/gtx_color_space.cpp
index 50e1eaa6c..0e6bcd90e 100644
--- a/test/gtx/gtx_color_space.cpp
+++ b/test/gtx/gtx_color_space.cpp
@@ -1,5 +1,4 @@
 #include <glm/ext/vector_relational.hpp>
-#include <glm/ext/scalar_constants.hpp>
 
 #define GLM_ENABLE_EXPERIMENTAL
 #include <glm/gtx/color_space.hpp>