diff --git a/libpostproc/Makefile b/libpostproc/Makefile
index e3d320bc62..7a10860c4e 100644
--- a/libpostproc/Makefile
+++ b/libpostproc/Makefile
@@ -16,7 +16,6 @@ SHARED_OBJS=postprocess_pic.o
 HEADERS = postprocess.h
 
 CFLAGS  = -I.. -I$(SRC_PATH)/libavutil $(OPTFLAGS)
-# -I/usr/X11R6/include/
 
 include $(SRC_PATH)/common.mak