diff --git a/libavformat/Makefile b/libavformat/Makefile
index 18d89da35f..f6ef3a71b4 100644
--- a/libavformat/Makefile
+++ b/libavformat/Makefile
@@ -81,9 +81,9 @@ OBJS-$(CONFIG_IPOD_MUXER)                += movenc.o riff.o isom.o avc.o
 OBJS-$(CONFIG_LMLM4_DEMUXER)             += lmlm4.o
 OBJS-$(CONFIG_M4V_DEMUXER)               += raw.o
 OBJS-$(CONFIG_M4V_MUXER)                 += raw.o
-OBJS-$(CONFIG_MATROSKA_AUDIO_MUXER)      += matroskaenc.o matroska.o riff.o avc.o
-OBJS-$(CONFIG_MATROSKA_DEMUXER)          += matroskadec.o matroska.o riff.o
-OBJS-$(CONFIG_MATROSKA_MUXER)            += matroskaenc.o matroska.o riff.o avc.o
+OBJS-$(CONFIG_MATROSKA_AUDIO_MUXER)      += matroskaenc.o matroska.o riff.o isom.o avc.o
+OBJS-$(CONFIG_MATROSKA_DEMUXER)          += matroskadec.o matroska.o riff.o isom.o
+OBJS-$(CONFIG_MATROSKA_MUXER)            += matroskaenc.o matroska.o riff.o isom.o avc.o
 OBJS-$(CONFIG_MJPEG_DEMUXER)             += raw.o
 OBJS-$(CONFIG_MJPEG_MUXER)               += raw.o
 OBJS-$(CONFIG_MLP_DEMUXER)               += raw.o