diff --git a/model/user.go b/model/user.go
index ca12bbae38..37ac19af35 100644
--- a/model/user.go
+++ b/model/user.go
@@ -6,7 +6,7 @@ import (
 )
 
 // validate a username (e.g. from github)
-var reUsername = regexp.MustCompile("^[a-zA-Z0-9-_]+$")
+var reUsername = regexp.MustCompile("^[a-zA-Z0-9-_.]+$")
 
 var errUserLoginInvalid = errors.New("Invalid User Login")
 
diff --git a/model/user_test.go b/model/user_test.go
index a11eaa1e77..27b568f516 100644
--- a/model/user_test.go
+++ b/model/user_test.go
@@ -35,6 +35,10 @@ func TestUserValidate(t *testing.T) {
 			user: User{Login: "john_smith"},
 			err:  nil,
 		},
+		{
+			user: User{Login: "john.smith"},
+			err:  nil,
+		},
 	}
 
 	for _, test := range tests {