diff --git a/source/gameengine/Rasterizer/RAS_OpenGLRasterizer/RAS_GLExtensionManager.h b/source/gameengine/Rasterizer/RAS_OpenGLRasterizer/RAS_GLExtensionManager.h
index 5fd94ae53b7..119eda3b5bb 100644
--- a/source/gameengine/Rasterizer/RAS_OpenGLRasterizer/RAS_GLExtensionManager.h
+++ b/source/gameengine/Rasterizer/RAS_OpenGLRasterizer/RAS_GLExtensionManager.h
@@ -43,7 +43,7 @@
 #endif
 
 #include "EXT_separate_specular_color.h"
-#include "ARB_Multitexture.h"
+#include "ARB_multitexture.h"
 
 namespace bgl
 {