diff --git a/bwifi.sh b/bwifi.sh
index 7d276ee..1aa7b45 100755
--- a/bwifi.sh
+++ b/bwifi.sh
@@ -14,7 +14,7 @@ echo 'response received'
 
 # If authorizing is requested, school network will respond any HTTP (not HTTPS) request with an 302
 # response and its "Server" field is "DrcomServer"
-if ! grep "Server: DrcomServer" <<< $res_headers ; then
+if ! echo -n "$res_headers" | grep "Server: DrcomServer" ; then
     echo "didn't receive a response from DrcomServer, you may already be online."
     exit 1
 fi