diff --git a/frappe/core/doctype/user/user.py b/frappe/core/doctype/user/user.py
index 99b68ed536..5f4b1d3fae 100644
--- a/frappe/core/doctype/user/user.py
+++ b/frappe/core/doctype/user/user.py
@@ -361,7 +361,7 @@ class User(Document):
 				self.set(field, sanitize_html(field_value, always_sanitize=True))
 
 	def set_full_name(self):
-		self.full_name = " ".join(filter(None, [self.first_name, self.last_name]))
+		self.full_name = " ".join(p for p in [self.first_name, self.middle_name, self.last_name] if p)
 
 	def check_enable_disable(self):
 		# do not allow disabling administrator/guest