diff --git a/vector/src/main/java/im/vector/app/features/call/webrtc/WebRtcCallExt.kt b/vector/src/main/java/im/vector/app/features/call/webrtc/WebRtcCallExt.kt
index ef9ef3ef9a..ac9d169633 100644
--- a/vector/src/main/java/im/vector/app/features/call/webrtc/WebRtcCallExt.kt
+++ b/vector/src/main/java/im/vector/app/features/call/webrtc/WebRtcCallExt.kt
@@ -16,17 +16,20 @@
 
 package im.vector.app.features.call.webrtc
 
+import org.matrix.android.sdk.api.extensions.orFalse
 import org.matrix.android.sdk.api.session.Session
 import org.matrix.android.sdk.api.util.MatrixItem
 import org.matrix.android.sdk.api.util.toMatrixItem
 
 fun WebRtcCall.getOpponentAsMatrixItem(session: Session): MatrixItem? {
-    return session.getRoomSummary(nativeRoomId)?.let { roomSummary ->
+    return session.getRoom(nativeRoomId)?.let { room ->
+        val roomSummary = room.roomSummary() ?: return@let null
         // Fallback to RoomSummary if there is no other member.
-        if (roomSummary.otherMemberIds.isEmpty()) {
+        if (roomSummary.otherMemberIds.isEmpty().orFalse()) {
             roomSummary.toMatrixItem()
         } else {
-            roomSummary.otherMemberIds.first().let { session.getUser(it)?.toMatrixItem() }
+            val userId = roomSummary.otherMemberIds.first()
+            return room.getRoomMember(userId)?.toMatrixItem()
         }
     }
 }