diff --git a/public/app/plugins/datasource/mysql/mysql_query.ts b/public/app/plugins/datasource/mysql/mysql_query.ts
index e636d66e6fd..9494d867fad 100644
--- a/public/app/plugins/datasource/mysql/mysql_query.ts
+++ b/public/app/plugins/datasource/mysql/mysql_query.ts
@@ -52,7 +52,7 @@ export default class MysqlQuery {
   }
 
   escapeLiteral(value) {
-    return value.replace(/'/g, "''");
+    return String(value).replace(/'/g, "''");
   }
 
   hasTimeGroup() {