diff --git a/agent/agent.sh b/agent/agent.sh
index f0ea5d4..b8edb1b 100644
--- a/agent/agent.sh
+++ b/agent/agent.sh
@@ -38,8 +38,8 @@ function downloadUpdate {
   URL="https://raw.githubusercontent.com/kroese/virtual-dsm/master/agent/agent.sh"
   remote_size=$(curl -sIk -m 4 "${URL}" | grep -i "content-length:" | tr -d " \t" | cut -d ':' -f 2)
 
+  [ remote_size -eq 0 ] && return
   [ "$remote_size" == "" ] && return
-  [ "$remote_size" == "0" ] && return
 
   SCRIPT=$(readlink -f ${BASH_SOURCE[0]})
   local_size=$(stat -c%s "$SCRIPT")