diff --git a/code/OpenGEXExporter.h b/code/OpenGEXExporter.h
index 8d0951d9e..e7e784490 100644
--- a/code/OpenGEXExporter.h
+++ b/code/OpenGEXExporter.h
@@ -55,7 +55,7 @@ namespace OpenGEX {
 } // Namespace openGEX
 } // Namespace Assimp
 
-#endif ASSIMP_BUILD_NO_OPENGEX_IMPORTER
+#endif // ASSIMP_BUILD_NO_OPENGEX_IMPORTER
 
 #endif // AI_OPENGEX_EXPORTER_H