fix quotes

diff --git a/acinclude.m4 b/acinclude.m4
index 0e0506acc85fe6722d2effa9a277257edadd9814..68cdb630bb283b0df12851e19b2b76285aeb205f 100644 (file)
--- a/acinclude.m4
+++ b/acinclude.m4
@@ -1100,7 +1100,7 @@ dnl
 dnl Set libtool variable
 dnl
 AC_DEFUN([PHP_SET_LIBTOOL_VARIABLE],[
-  if test -z $LIBTOOL; then
+  if test -z "$LIBTOOL"; then
     LIBTOOL='$(SHELL) $(top_builddir)/libtool $1'
   else
     LIBTOOL="$LIBTOOL $1"