diff --git a/bin/lein b/bin/lein
old mode 100755
new mode 100644
index e47ad61f..d35a30dc
--- a/bin/lein
+++ b/bin/lein
@@ -83,7 +83,7 @@ fi
 
 HTTP_CLIENT="wget --no-check-certificate -O"
 if type -p curl >/dev/null 2>&1; then
-    if [ $https_proxy != "" ]; then
+    if [ "$https_proxy" != "" ]; then
         CURL_PROXY="-x $https_proxy"
     fi
     HTTP_CLIENT="curl $CURL_PROXY --insecure -f -L -o"