diff --git a/avrdude/pgm.h b/avrdude/pgm.h
index 8ab8365f..882d8888 100644
--- a/avrdude/pgm.h
+++ b/avrdude/pgm.h
@@ -121,7 +121,7 @@ PROGRAMMER * pgm_new(void);
 */
 void usleep(unsigned long us);
 
-void gettimeofday(struct timeval *tv, struct timezone *tz);
+int gettimeofday(struct timeval *tv, struct timezone *tz);
 
 #endif /* __win32native_h */