diff --git a/tools/check-bitcoin-only b/tools/check-bitcoin-only
index 055e44992..4265e1a99 100755
--- a/tools/check-bitcoin-only
+++ b/tools/check-bitcoin-only
@@ -17,4 +17,7 @@ for altcoin in $ALTCOINS; do
 done
 IFS=$OLDIFS
 
+if [ $RETURN -ne 0 ]; then
+    echo "ERROR: Altcoin strings found in Bitcoin-only firmware."
+fi
 exit $RETURN