diff --git a/src/config-mac.h b/src/config-mac.h
index 949a22f64..9e8daf0e4 100644
--- a/src/config-mac.h
+++ b/src/config-mac.h
@@ -1,6 +1,4 @@
-#include "GUSICommandLine.h"
-
 #define main(x,y) curl_main(x,y)
 
 /* we provide our own strdup prototype */
-char *strdup(const char *s1);
+char *strdup(char *s1);