diff --git a/winsup/cygwin/Makefile.in b/winsup/cygwin/Makefile.in
index f6236d909..cb9924b3a 100644
--- a/winsup/cygwin/Makefile.in
+++ b/winsup/cygwin/Makefile.in
@@ -783,13 +783,16 @@ $(VERSION_OFILES): version.cc
 Makefile: ${srcdir}/Makefile.in
 	/bin/sh ./config.status
 
-$(DEF_FILE) sigfe.s: gendef $(srcdir)/$(TLSOFFSETS_H) $(DIN_FILE)
-	$(word 1,$^) --cpu=${target_cpu} --output-def=$(DEF_FILE) --tlsoffsets=$(word 2,$^) $(wordlist 3,4,$^)
+$(DEF_FILE): gendef $(srcdir)/$(TLSOFFSETS_H) $(DIN_FILE)
+	$(word 1,$^) --cpu=${target_cpu} --output-def=$@  --tlsoffsets=$(word 2,$^) $(wordlist 3,99,$^)
 
 $(srcdir)/$(TLSOFFSETS_H): gentls_offsets cygtls.h
 	$^ $@ $(target_cpu) $(COMPILE.cc) -c || rm $@
 
 sigfe.s: $(DEF_FILE)
+	@[ -s $@ ] || \
+	{ rm -f $(DEF_FILE); $(MAKE) -s -j1 $(DEF_FILE); }; \
+	[ -s $@ ] && touch $@
 
 sigfe.o: sigfe.s $(srcdir)/$(TLSOFFSETS_H)
 	$(CC) ${CFLAGS} -c -o $@ $<