diff --git a/libavutil/log.h b/libavutil/log.h
index 5d18197efb..7baebef683 100644
--- a/libavutil/log.h
+++ b/libavutil/log.h
@@ -101,15 +101,15 @@ extern int av_log_level;
  * @see av_vlog
  */
 #ifdef __GNUC__
-extern void av_log(void*, int level, const char *fmt, ...) __attribute__ ((__format__ (__printf__, 3, 4)));
+void av_log(void*, int level, const char *fmt, ...) __attribute__ ((__format__ (__printf__, 3, 4)));
 #else
-extern void av_log(void*, int level, const char *fmt, ...);
+void av_log(void*, int level, const char *fmt, ...);
 #endif
 
-extern void av_vlog(void*, int level, const char *fmt, va_list);
-extern int av_log_get_level(void);
-extern void av_log_set_level(int);
-extern void av_log_set_callback(void (*)(void*, int, const char*, va_list));
-extern void av_log_default_callback(void* ptr, int level, const char* fmt, va_list vl);
+void av_vlog(void*, int level, const char *fmt, va_list);
+int av_log_get_level(void);
+void av_log_set_level(int);
+void av_log_set_callback(void (*)(void*, int, const char*, va_list));
+void av_log_default_callback(void* ptr, int level, const char* fmt, va_list vl);
 
 #endif /* FFMPEG_LOG_H */