diff --git a/libavformat/Makefile b/libavformat/Makefile
index 4d2094afc9..b2ed240a1b 100644
--- a/libavformat/Makefile
+++ b/libavformat/Makefile
@@ -121,7 +121,7 @@ OBJS-$(CONFIG_RM_DEMUXER)                += rmdec.o
 OBJS-$(CONFIG_RM_MUXER)                  += rmenc.o
 OBJS-$(CONFIG_ROQ_DEMUXER)               += idroq.o
 OBJS-$(CONFIG_ROQ_MUXER)                 += raw.o
-OBJS-$(CONFIG_RTP_MUXER)                 += rtp.o rtp_h264.o rtp_mpv.o rtp_aac.o
+OBJS-$(CONFIG_RTP_MUXER)                 += rtp.o rtp_h264.o rtsp.o rtp_mpv.o rtp_aac.o
 OBJS-$(CONFIG_RTSP_DEMUXER)              += rtsp.o
 OBJS-$(CONFIG_SDP_DEMUXER)               += rtsp.o
 OBJS-$(CONFIG_SEGAFILM_DEMUXER)          += segafilm.o