diff --git a/addons/web/static/src/js/pyeval.js b/addons/web/static/src/js/pyeval.js
index a651c7d8bfa..cf57bd86d4f 100644
--- a/addons/web/static/src/js/pyeval.js
+++ b/addons/web/static/src/js/pyeval.js
@@ -854,7 +854,8 @@
         var result_domain = [];
         // Normalize only if the first domain is the array ["|"] or ["!"]
         var need_normalization = (
-            domains.length > 0
+            domains
+            && domains.length > 0
             && domains[0].length === 1
             && (domains[0][0] === "|" || domains[0][0] === "!")
         );