diff --git a/libavcodec/Makefile b/libavcodec/Makefile
index 3d0cb8ce32..66233d01df 100644
--- a/libavcodec/Makefile
+++ b/libavcodec/Makefile
@@ -522,7 +522,7 @@ OBJS-$(CONFIG_NUT_MUXER)               += mpegaudiodata.o
 OBJS-$(CONFIG_OGG_DEMUXER)             += flacdec.o flacdata.o flac.o \
                                           dirac.o mpeg12data.o
 OBJS-$(CONFIG_OGG_MUXER)               += xiph.o flacdec.o flacdata.o flac.o
-OBJS-$(CONFIG_RTP_MUXER)               += mpegvideo.o
+OBJS-$(CONFIG_RTP_MUXER)               += mpegvideo.o xiph.o
 OBJS-$(CONFIG_WEBM_MUXER)              += xiph.o mpeg4audio.o \
                                           flacdec.o flacdata.o flac.o