diff --git a/bin/update-property-map.php b/bin/update-property-map.php
index 001a64022b2..340b6feec2b 100755
--- a/bin/update-property-map.php
+++ b/bin/update-property-map.php
@@ -73,6 +73,7 @@ function extractClassesFromStatements(array $statements): array
 if (false === $docDir) {
     echo 'PHP doc not found!' . PHP_EOL;
     echo 'Please execute: git clone git@github.com:php/doc-en.git ' . dirname(__DIR__) . '/build/doc-en';
+    die(1);
 }
 
 $files = new RegexIterator(