diff --git a/Makefile.in b/Makefile.in
--- a/Makefile.in
+++ b/Makefile.in
@@ -91,7 +91,7 @@ ifeq ($(shell if test -f config.cache; t
 	@echo " Going to reconfigure with last known settings..."
 	@echo "----------------"
 # Make sure we don't lock config.cache
-	@$(shell cat config.cache | sed 's#\\ #\\\\ #g') || exit 1
+	@$(shell cat config.cache | sed 's~\\ ~\\\\ ~g') || exit 1
 	@echo "----------------"
 	@echo "Reconfig done. Please re-execute make."
 	@echo "----------------"