--- gforth/preforth.in	2008/10/25 17:18:42	1.6
+++ gforth/preforth.in	2008/12/23 17:37:17	1.7
@@ -20,7 +20,7 @@
 test -z "$ENGINE" && ENGINE=./gforth
 test -f "@srcdir@/@kernel_fi@" && KERNEL="@srcdir@/@kernel_fi@"
 test -f "@kernel_fi@" && KERNEL="@kernel_fi@"
-if test -f $ENGINE -a -f $KERNEL; then 
+if test -f "$ENGINE" -a -f "$KERNEL"; then 
   path1="$1"
   path2="$2"
   shift; shift