diff --git a/update.sh b/update.sh
index 4fc5b56..988437c 100755
--- a/update.sh
+++ b/update.sh
@@ -14,5 +14,6 @@ if git verify-tag "$TAG" 2>/dev/null | grep "TRUST_ULTIMATE" > /dev/null; then
     git checkout "$TAG";
     ./configure.sh;
 else
+    echo "Invalid or missing signature for $TAG" >&2;
     exit 1;
 fi