diff --git a/public/src/utils.js b/public/src/utils.js
index b2d86fedb1..93af4b1e71 100644
--- a/public/src/utils.js
+++ b/public/src/utils.js
@@ -126,7 +126,7 @@
 		},
 
 		isUserNameValid: function (name) {
-			return (name && name !== '' && (/^['"\s\-.*0-9\u00BF-\u1FFF\u2C00-\uD7FF\w]+$/.test(name)));
+			return (name && name !== '' && (/^['"\s\-\+.*0-9\u00BF-\u1FFF\u2C00-\uD7FF\w]+$/.test(name)));
 		},
 
 		isPasswordValid: function (password) {