diff --git a/libavcodec/Makefile b/libavcodec/Makefile
index 2b4fdd226c..3ac7bd25fb 100644
--- a/libavcodec/Makefile
+++ b/libavcodec/Makefile
@@ -240,7 +240,6 @@ EXTRALIBS += -L../libavutil -lavutil$(BUILDSUF)
 # currently using libdts for dts decoding
 ifeq ($(CONFIG_DTS),yes)
 OBJS+= dtsdec.o
-CFLAGS+= $(DTS_INC)
 endif
 
 ifeq ($(CONFIG_FAAD),yes)