diff --git a/lib/web/mage/validation.js b/lib/web/mage/validation.js
index 86dd5a3b03681..a577208894944 100644
--- a/lib/web/mage/validation.js
+++ b/lib/web/mage/validation.js
@@ -364,7 +364,7 @@
         ],
         'time12h': [
             function (value, element) {
-                return this.optional(element) || /^((0?[1-9]|1[012])(:[0-5]\d){0,2}(\ [AP]M))$/i.test(value);
+                return this.optional(element) || /^((0?[1-9]|1[012])(:[0-5]\d){0,2}(\s[AP]M))$/i.test(value);
             },
             $.mage.__('Please enter a valid time, between 00:00 am and 12:00 pm')
         ],