diff --git a/matrix_sdk_base/src/models/room.rs b/matrix_sdk_base/src/models/room.rs
index e37c0dec..ea171660 100644
--- a/matrix_sdk_base/src/models/room.rs
+++ b/matrix_sdk_base/src/models/room.rs
@@ -358,7 +358,9 @@ impl Room {
     }
 
     /// Process the member event of an entering user.
-    fn add_member(&mut self, event: &MemberEvent) {
+    ///
+    /// Returns true if this made a change to the room's state, false otherwise.
+    fn add_member(&mut self, event: &MemberEvent) -> bool {
         let new_member = RoomMember::new(event);
 
         match event.membership_change() {
@@ -383,15 +385,15 @@ impl Room {
         };
 
         // Perform display name disambiguations, if necessary.
-        let disambiguations =
-            self.disambiguation_updates(&new_member, MemberDirection::Entering);
-
+        let disambiguations = self.disambiguation_updates(&new_member, MemberDirection::Entering);
         for (id, name) in disambiguations.into_iter() {
             match name {
                 None => self.disambiguated_display_names.remove(&id),
                 Some(name) => self.disambiguated_display_names.insert(id, name),
             };
         }
+
+        true
     }
 
     /// Process the member event of a leaving user.
@@ -582,9 +584,7 @@ impl Room {
 
         match event.membership_change() {
             Invited | Joined => {
-                self.add_member(event);
-
-                true
+                self.add_member(event)
             }
             Kicked | Banned | KickedAndBanned | InvitationRejected | Left => {
                 self.remove_member(event)