diff --git a/overlay/usr/local/bin/healthcheck.sh b/overlay/usr/local/bin/healthcheck.sh
index 588bc8b..46787f6 100755
--- a/overlay/usr/local/bin/healthcheck.sh
+++ b/overlay/usr/local/bin/healthcheck.sh
@@ -6,4 +6,9 @@ URL=http://localhost
 wget --quiet --tries=1 --spider ${URL}
 [ $? -ne 0 ] && exit 1
 
+CONTENT=$(wget --quiet -O - ${URL})
+case "$CONTENT" in
+  *"Internal Error"*) exit 1 ;;
+esac
+
 exit 0