diff --git a/common.mak b/common.mak
index d4eda1b4f2..8c2b375d40 100644
--- a/common.mak
+++ b/common.mak
@@ -33,9 +33,12 @@ endif
 
 ALLFFLIBS = avcodec avdevice avfilter avformat avutil postproc swscale
 
-CPPFLAGS := -I$(BUILD_ROOT_REL) -I$(SRC_PATH) $(CPPFLAGS)
+IFLAGS   := -I$(BUILD_ROOT_REL) -I$(SRC_PATH)
+CPPFLAGS := $(IFLAGS) $(CPPFLAGS)
 CFLAGS   += $(ECFLAGS)
 
+HOSTCFLAGS += $(IFLAGS)
+
 %.o: %.c
 	$(CCDEP)
 	$(CC) $(CPPFLAGS) $(CFLAGS) $(CC_DEPFLAGS) -c $(CC_O) $<