diff --git a/src/raylib.h b/src/raylib.h
index bdca64329..825867a70 100644
--- a/src/raylib.h
+++ b/src/raylib.h
@@ -203,7 +203,7 @@
 // Types and Structures Definition
 //----------------------------------------------------------------------------------
 // Boolean type
-#if (defined(__STDC__) && __STDC_VERSION__ >= 199901L) || (defined(_MSC_VER) && _MSC_VER >= 1800)
+#if (defined(__STDC__) && (defined(__STDC_VERSION__) && __STDC_VERSION__) >= 199901L) || (defined(_MSC_VER) && _MSC_VER >= 1800)
     #include <stdbool.h>
 #elif !defined(__cplusplus) && !defined(bool)
     typedef enum bool { false = 0, true = !false } bool;