diff --git a/scripts/codesign_example.sh b/scripts/codesign_example.sh
index b7a93badc..24badd2be 100755
--- a/scripts/codesign_example.sh
+++ b/scripts/codesign_example.sh
@@ -157,5 +157,9 @@ signed_checksum=$(
 )
 
 echo "${signed_checksum}  signed_${SN_ID}.zip" | $SHASUM_PROG -c
+if [ $? -ne 0 ]
+then
+  exit 1
+fi
 
 mv "signed_${SN_ID}.zip" "$TARGET_ZIP"