diff --git a/firmware/debug.h b/firmware/debug.h
index adedfd9546..0f6b1eed64 100644
--- a/firmware/debug.h
+++ b/firmware/debug.h
@@ -23,7 +23,7 @@ extern void debugf(char* fmt,...);
 
 #ifdef __GNUC__
 
-/* GCC handles ellipses in macros, which 
+/* GCC handles ellipses in macros, which
    means we can avoid the call completely */
 #ifdef DEBUG
 #define DEBUGF(fmt,args...) debugf(fmt, ## args)
@@ -33,7 +33,7 @@ extern void debugf(char* fmt,...);
 
 #else
 
-void DEBUGF debugf
+#define DEBUGF debugf
 
 #endif /* GCC */