diff --git a/libavfilter/avfilter.c b/libavfilter/avfilter.c
index d70db1b283..7362bcdab5 100644
--- a/libavfilter/avfilter.c
+++ b/libavfilter/avfilter.c
@@ -47,7 +47,7 @@
 #include "libavutil/ffversion.h"
 const char av_filter_ffversion[] = "FFmpeg version " FFMPEG_VERSION;
 
-void ff_tlog_ref(void *ctx, AVFrame *ref, int end)
+static void tlog_ref(void *ctx, AVFrame *ref, int end)
 {
     ff_tlog(ctx,
             "ref[%p buf:%p data:%p linesize[%d, %d, %d, %d] pts:%"PRId64" pos:%"PRId64,
@@ -1018,7 +1018,7 @@ fail:
 int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
 {
     int ret;
-    FF_TPRINTF_START(NULL, filter_frame); ff_tlog_link(NULL, link, 1); ff_tlog(NULL, " "); ff_tlog_ref(NULL, frame, 1);
+    FF_TPRINTF_START(NULL, filter_frame); ff_tlog_link(NULL, link, 1); ff_tlog(NULL, " "); tlog_ref(NULL, frame, 1);
 
     /* Consistency checks */
     if (link->type == AVMEDIA_TYPE_VIDEO) {
diff --git a/libavfilter/internal.h b/libavfilter/internal.h
index e7c154aff0..116d5fcc96 100644
--- a/libavfilter/internal.h
+++ b/libavfilter/internal.h
@@ -230,8 +230,6 @@ void ff_command_queue_pop(AVFilterContext *filter);
 
 char *ff_get_ref_perms_string(char *buf, size_t buf_size, int perms);
 
-void ff_tlog_ref(void *ctx, AVFrame *ref, int end);
-
 void ff_tlog_link(void *ctx, AVFilterLink *link, int end);
 
 /**