diff --git a/share/actionsmap.yml b/share/actionsmap.yml
index 464a4e024..9382c70f3 100644
--- a/share/actionsmap.yml
+++ b/share/actionsmap.yml
@@ -63,7 +63,7 @@ user:
                     help: The unique username to create
                     extra:
                         pattern: &pattern_username
-                            - !!str ^[a-z0-9_]+$
+                            - !!str ^[a-z0-9_\.]+$
                             - "pattern_username"
                 -F:
                     full: --fullname
diff --git a/src/user.py b/src/user.py
index 00876854e..4ad23525a 100644
--- a/src/user.py
+++ b/src/user.py
@@ -38,7 +38,7 @@ from yunohost.utils.system import binary_to_human
 logger = getActionLogger("yunohost.user")
 
 FIELDS_FOR_IMPORT = {
-    "username": r"^[a-z0-9_]+$",
+    "username": r"^[a-z0-9_.]+$",
     "firstname": r"^([^\W\d_]{1,30}[ ,.\'-]{0,3})+$",
     "lastname": r"^([^\W\d_]{1,30}[ ,.\'-]{0,3})+$",
     "password": r"^|(.{3,})$",