diff --git a/data/examples/shaders/base.effect b/data/examples/shaders/base.effect
index 34eb131..2e9e8a1 100644
--- a/data/examples/shaders/base.effect
+++ b/data/examples/shaders/base.effect
@@ -38,7 +38,7 @@
 #define PHI 1.61803398874989484820459
 
 // e (Eulers Constant)
-#define EULERS_CONSTANT 2,7182818284590452353602874713527
+#define EULERS_CONSTANT 2.7182818284590452353602874713527
 
 // Degrees <-> Radians Conversion
 #define TO_RAD(x) (x *  0.017453292)