diff --git a/Makefile.in b/Makefile.in
index 7f9cc08..5871a5f 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -10,12 +10,12 @@
 
 
 @SET_MAKE@
-LONGPATH=${PATH}:@PATH@
+LONGPATH="${PATH}:@PATH@"
 
 default: files
 
 files all install tf clean uninstall: _force_
-	@cd src; PATH=${LONGPATH} ${MAKE} $@
+	@cd src; PATH="${LONGPATH}" "${MAKE}" $@
 
 _force_: