diff --git a/Riot/Modules/Room/Views/Title/Preview/PreviewRoomTitleView.m b/Riot/Modules/Room/Views/Title/Preview/PreviewRoomTitleView.m
index 8aab86425..c0948422b 100644
--- a/Riot/Modules/Room/Views/Title/Preview/PreviewRoomTitleView.m
+++ b/Riot/Modules/Room/Views/Title/Preview/PreviewRoomTitleView.m
@@ -121,7 +121,8 @@
         // Joined members count
         if (self.roomPreviewData.numJoinedMembers > 1)
         {
-            self.roomMembers.text = [VectorL10n roomTitleMembers:@(self.roomPreviewData.numJoinedMembers)];
+            NSString *numJoinedMembers = [@(self.roomPreviewData.numJoinedMembers) description];
+            self.roomMembers.text = [VectorL10n roomTitleMembers:numJoinedMembers];
         }
         else if (self.roomPreviewData.numJoinedMembers == 1)
         {
diff --git a/changelog.d/4982.bugfix b/changelog.d/4982.bugfix
new file mode 100644
index 000000000..3aac0add4
--- /dev/null
+++ b/changelog.d/4982.bugfix
@@ -0,0 +1 @@
+RoomVC: Fix a crash when previewing a room.