diff --git a/include/bx/fpumath.h b/include/bx/fpumath.h
index b85fb9c..37d4fec 100644
--- a/include/bx/fpumath.h
+++ b/include/bx/fpumath.h
@@ -14,10 +14,10 @@
 
 namespace bx
 {
-	const float pi     = 3.14159265358979323846f;
-	const float invPi  = 1.0f/3.14159265358979323846f;
-	const float piHalf = 1.57079632679489661923f;
-	const float sqrt2  = 1.41421356237309504880f;
+	static const float pi     = 3.14159265358979323846f;
+	static const float invPi  = 1.0f/3.14159265358979323846f;
+	static const float piHalf = 1.57079632679489661923f;
+	static const float sqrt2  = 1.41421356237309504880f;
 
 	inline float toRad(float _deg)
 	{