Index: Makefile
===================================================================
--- Makefile	(revision 443412)
+++ Makefile	(working copy)
@@ -26,7 +26,7 @@
 MAKE_ARGS=	SHARED=1 \
 		CC="${CC}" \
 		LFLAGS_NATIVE="${LDFLAGS} -lpthread" \
-		CFLAGS_NATIVE="${CFLAGS} -Iinclude -IOpenCL -Iinclude/lzma_sdk"
+		CFLAGS_NATIVE="-isystem /usr/include ${CFLAGS} -Iinclude -IOpenCL -Iinclude/lzma_sdk"
 
 pre-install:
 	${STRIP_CMD} ${WRKSRC}/libhashcat.so