diff --git a/libswscale/Makefile b/libswscale/Makefile
index 86b28d3dec..185a9ab779 100644
--- a/libswscale/Makefile
+++ b/libswscale/Makefile
@@ -7,10 +7,6 @@ LIBVERSION=$(SWSVERSION)
 LIBMAJOR=$(SWSMAJOR)
 endif
 
-CFLAGS=-I$(BUILD_ROOT) -I$(SRC_PATH) -I$(SRC_PATH)/libavutil $(OPTFLAGS) \
-       -DHAVE_AV_CONFIG_H -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE \
-       -D_ISOC9X_SOURCE
-
 OBJS= swscale.o rgb2rgb.o yuv2rgb.o
 ifeq ($(TARGET_ALTIVEC),yes)
 OBJS+=  yuv2rgb_altivec.o