diff --git a/libavformat/asf.h b/libavformat/asf.h
index f336c43fa3..2a817dddba 100644
--- a/libavformat/asf.h
+++ b/libavformat/asf.h
@@ -230,7 +230,12 @@ extern const AVMetadataConv ff_asf_metadata_conv[];
 #define ASF_PL_FLAG_KEY_FRAME 0x80 //1000 0000
 
 extern AVInputFormat ff_asf_demuxer;
-int ff_guidcmp(const void *g1, const void *g2);
+
+static av_always_inline int ff_guidcmp(const void *g1, const void *g2)
+{
+    return memcmp(g1, g2, sizeof(ff_asf_guid));
+}
+
 void ff_get_guid(ByteIOContext *s, ff_asf_guid *g);
 
 #endif /* AVFORMAT_ASF_H */
diff --git a/libavformat/asfdec.c b/libavformat/asfdec.c
index 35e892c439..a73a347a51 100644
--- a/libavformat/asfdec.c
+++ b/libavformat/asfdec.c
@@ -49,11 +49,6 @@ static const ff_asf_guid stream_bitrate_guid = { /* (http://get.to/sdp) */
 /**********************************/
 /* decoding */
 
-int ff_guidcmp(const void *g1, const void *g2)
-{
-    return memcmp(g1, g2, sizeof(ff_asf_guid));
-}
-
 #ifdef DEBUG
 #define PRINT_IF_GUID(g,cmp) \
 if (!ff_guidcmp(g, &cmp)) \