diff --git a/Makefile.in b/Makefile.in
--- a/Makefile.in
+++ b/Makefile.in
@@ -79,7 +79,7 @@ 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) || exit 1
+	@$(shell cat config.cache | sed 's/\\ /\\\\ /g') || exit 1
 	@echo "----------------"
 	@echo "Reconfig done. Now compiling..."
 	@echo "----------------"
diff --git a/config.lib b/config.lib
--- a/config.lib
+++ b/config.lib
@@ -823,7 +823,7 @@ check_params() {
 	if [ "$shared_dir" = "1" ]; then
 		# we are using default values
 		if [ "$os" = "OSX" ]; then
-			shared_dir='/Library/Application\\ Support/OpenTTD'
+			shared_dir="/Library/Application\\\\ Support/OpenTTD"
 		else
 			shared_dir=""
 		fi
diff --git a/configure b/configure
--- a/configure
+++ b/configure
@@ -37,7 +37,7 @@ if [ "$1" = "--reconfig" ] || [ "$1" = "
 		exit 1
 	fi
 	# Make sure we don't lock config.cache
-	cat config.cache > cache.tmp
+	cat config.cache | sed 's/\\ /\\\\ /g' > cache.tmp
 	sh cache.tmp
 	rm -f cache.tmp
 	exit $?