diff --git a/lib/Makefile.am b/lib/Makefile.am
index c283769ec6d360c4c649775cb1e0a7d501c98546..691d7b741a0e3f425fb7582bc11d4a5885a449f3 100644
--- a/lib/Makefile.am
+++ b/lib/Makefile.am
@@ -91,7 +91,9 @@ $(srcdir)/getdate.c: getdate.y
 	  mv -f y.tab.c getdate.c
 
 $(srcdir)/ca-bundle.h: Makefile.in Makefile
-	chmod 0644 $@
+	@if test -f $@; then \
+	  chmod 0644 $@; \
+	fi
 	echo "/* The file is generated automaticly */" > $@
 if CABUNDLE
 	echo '#define CURL_CA_BUNDLE @CURL_CA_BUNDLE@' >> $@