diff --git a/pkgsrc-newprefix b/pkgsrc-newprefix
index 685f30d..f7f3511 100755
--- a/pkgsrc-newprefix
+++ b/pkgsrc-newprefix
@@ -134,7 +134,7 @@
 	EOF
     exit 1
   fi
-elif [ -n "usebash" -a type bash >/dev/null 2>&1 ]; then
+elif [ -n "$usebash" ] && type bash >/dev/null 2>&1; then
   export CONFIG_SHELL=`which bash`
   export WRAPPER_SHELL=$CONFIG_SHELL
 fi