diff --git a/glm/detail/setup.hpp b/glm/detail/setup.hpp
index 0ccf9c9e..05ffea78 100644
--- a/glm/detail/setup.hpp
+++ b/glm/detail/setup.hpp
@@ -10,7 +10,7 @@
 #define GLM_VERSION					991
 #define GLM_VERSION_MESSAGE			"GLM: version 0.9.9.1"
 
-#define GLM_SETUP_INCLUDED GLM_VERSION
+#define GLM_SETUP_INCLUDED			GLM_VERSION
 
 ///////////////////////////////////////////////////////////////////////////////////
 // Active states