--- openjdk/make/gensrc/GensrcX11Wrappers.gmk
+++ openjdk/make/gensrc/GensrcX11Wrappers.gmk
@@ -117,7 +117,8 @@
 	$(call LogInfo, Verifying X11 wrapper sizes)
 	$(call MakeDir, $(@D))
 	$(GENSRC_X11WRAPPERS_TMP)/sizer.$*.exe | $(SORT) > $@.tmp
-	$(DIFF) $(GENSRC_X11WRAPPERS_TMP)/sizes.$*.verification.tmp $(GENSRC_X11WRAPPERS_TMP)/sizes.$*
+	$(SORT) $(GENSRC_X11WRAPPERS_TMP)/sizes.$* > $@-orig.tmp
+	$(DIFF) $(GENSRC_X11WRAPPERS_TMP)/sizes.$*.verification.tmp $(GENSRC_X11WRAPPERS_TMP)/sizes.$*.verification-orig.tmp 
 	mv $@.tmp $@
 
   GENSRC_X11WRAPPERS += $(GENSRC_X11WRAPPERS_TMP)/sizes.$(OPENJDK_TARGET_CPU_BITS).verification