diff --git a/plugins/auto_assign_labels/init.php b/plugins/auto_assign_labels/init.php
old mode 100644
new mode 100755
index cc70e2dff..3fa4ad8c0
--- a/plugins/auto_assign_labels/init.php
+++ b/plugins/auto_assign_labels/init.php
@@ -38,7 +38,7 @@ class Auto_Assign_Labels extends Plugin {
 		$tags_str = join(",", $article["tags"]);
 
 		foreach ($labels as $label) {
-			$caption = preg_quote($label[1]);
+			$caption = preg_quote($label[1], "/");
 
 			if ($caption && preg_match("/\b$caption\b/i", "$tags_str " . strip_tags($article["content"]) . " " . $article["title"])) {
 
@@ -54,4 +54,4 @@ class Auto_Assign_Labels extends Plugin {
 	function api_version() {
 		return 2;
 	}
-}
\ No newline at end of file
+}