diff --git a/libavutil/log.c b/libavutil/log.c
index 8b2dc6f6d2..4fd503d0de 100644
--- a/libavutil/log.c
+++ b/libavutil/log.c
@@ -28,7 +28,7 @@
 
 int av_log_level = AV_LOG_INFO;
 
-static void av_log_default_callback(void* ptr, int level, const char* fmt, va_list vl)
+void av_log_default_callback(void* ptr, int level, const char* fmt, va_list vl)
 {
     static int print_prefix=1;
     AVClass* avc= ptr ? *(AVClass**)ptr : NULL;
diff --git a/libavutil/log.h b/libavutil/log.h
index 0ff1f9fcff..3a08c802b9 100644
--- a/libavutil/log.h
+++ b/libavutil/log.h
@@ -55,6 +55,7 @@ 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);
 #else
 extern void (*av_vlog)(void*, int, const char*, va_list);
 #endif