diff --git a/browser_patches/buildbots/buildbot-windows.sh b/browser_patches/buildbots/buildbot-windows.sh
index ce82a6cfda..eec0ffe0bd 100755
--- a/browser_patches/buildbots/buildbot-windows.sh
+++ b/browser_patches/buildbots/buildbot-windows.sh
@@ -43,6 +43,6 @@ while true; do
   newTimestamp=$(date +%s)
   delta=$(( 300 - newTimestamp + timestamp ));
   if (( delta > 0 )); then
-    sleep detla;
+    sleep $detla
   fi
 done;