diff --git a/libavformat/Makefile b/libavformat/Makefile
index 396061ef46..8251f8f657 100644
--- a/libavformat/Makefile
+++ b/libavformat/Makefile
@@ -470,7 +470,7 @@ OBJS-$(CONFIG_SCC_MUXER)                 += sccenc.o subtitles.o
 OBJS-$(CONFIG_SDP_DEMUXER)               += rtsp.o
 OBJS-$(CONFIG_SDR2_DEMUXER)              += sdr2.o
 OBJS-$(CONFIG_SDS_DEMUXER)               += sdsdec.o
-OBJS-$(CONFIG_SDX_DEMUXER)               += sdxdec.o
+OBJS-$(CONFIG_SDX_DEMUXER)               += sdxdec.o pcm.o
 OBJS-$(CONFIG_SEGAFILM_DEMUXER)          += segafilm.o
 OBJS-$(CONFIG_SEGAFILM_MUXER)            += segafilmenc.o
 OBJS-$(CONFIG_SEGMENT_MUXER)             += segment.o