diff --git a/firmware/gen_signature.sh b/firmware/gen_signature.sh
index baefc80737..1e6415f42a 100755
--- a/firmware/gen_signature.sh
+++ b/firmware/gen_signature.sh
@@ -2,6 +2,9 @@
 
 # file gen_signature.sh
 
+# fail fast
+set -e
+
 SHORT_BOARD_NAME=${1:-$SHORT_BOARD_NAME}
 
 cd $(dirname "$0")