diff --git a/libavformat/avformat.h b/libavformat/avformat.h
index de4f62ca04..da7fb791ff 100644
--- a/libavformat/avformat.h
+++ b/libavformat/avformat.h
@@ -1449,16 +1449,6 @@ int av_write_frame(AVFormatContext *s, AVPacket *pkt);
  */
 int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt);
 
-#if FF_API_INTERLEAVE_PACKET
-/**
- * @deprecated this function was never meant to be called by the user
- * programs.
- */
-attribute_deprecated
-int av_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out,
-                                 AVPacket *pkt, int flush);
-#endif
-
 /**
  * Write the stream trailer to an output media file and free the
  * file private data.
diff --git a/libavformat/mux.c b/libavformat/mux.c
index cb3c297a6b..76b0fb4dc6 100644
--- a/libavformat/mux.c
+++ b/libavformat/mux.c
@@ -495,15 +495,6 @@ int ff_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out,
     }
 }
 
-#if FF_API_INTERLEAVE_PACKET
-int av_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out,
-                                 AVPacket *pkt, int flush)
-{
-    return ff_interleave_packet_per_dts(s, out, pkt, flush);
-}
-
-#endif
-
 /**
  * Interleave an AVPacket correctly so it can be muxed.
  * @param out the interleaved packet will be output here
diff --git a/libavformat/version.h b/libavformat/version.h
index 0b19238163..4add31e776 100644
--- a/libavformat/version.h
+++ b/libavformat/version.h
@@ -49,9 +49,6 @@
  * the public API and may change, break or disappear at any time.
  */
 
-#ifndef FF_API_INTERLEAVE_PACKET
-#define FF_API_INTERLEAVE_PACKET       (LIBAVFORMAT_VERSION_MAJOR < 55)
-#endif
 #ifndef FF_API_AV_GETTIME
 #define FF_API_AV_GETTIME              (LIBAVFORMAT_VERSION_MAJOR < 55)
 #endif