diff --git a/includes/polling/applications/docker.inc.php b/includes/polling/applications/docker.inc.php
index 03a5b9a2ff..fb59e721c6 100644
--- a/includes/polling/applications/docker.inc.php
+++ b/includes/polling/applications/docker.inc.php
@@ -24,7 +24,7 @@ function convertToBytes(string $from): ?int
         return null;
     }
 
-    return $number * (1024 ** $exponent);
+    return (int) ($number * (1024 ** $exponent));
 }
 
 try {