diff --git a/scripts/examples/github.sh b/scripts/examples/github.sh
index 2883395..cb2c590 100755
--- a/scripts/examples/github.sh
+++ b/scripts/examples/github.sh
@@ -12,7 +12,7 @@ debug() {
 
 # Validate Github hook
 signature=$(echo -n "$1" | openssl sha1 -hmac "$GITHUB_SECRET" | sed -e 's/^.* //')
-[ "$signature" != "$x_hub_signature" ] && die "bad hook signature: expecting $x_hub_signature and got $signature"
+[ "sha1=$signature" != "$x_hub_signature" ] && die "bad hook signature: expecting $x_hub_signature and got $signature"
 
 # Validate parameters
 payload=$1
@@ -34,4 +34,4 @@ then
   issue_url=$(echo $payload | jq .issue.url -r)
   sender=$(echo $payload | jq .sender.login -r)
   echo "notify: New issue from $sender: $issue_url"
-fi
\ No newline at end of file
+fi