lint
diff --git a/Modules/mathmodule.c b/Modules/mathmodule.c
index e6decaa..76bfba2 100644
--- a/Modules/mathmodule.c
+++ b/Modules/mathmodule.c
@@ -36,7 +36,7 @@
 #include <math.h>
 
 #ifndef __STDC__
-extern double fmod();
+extern double fmod PROTO((double, double));
 #endif
 
 #ifdef HUGE_VAL