diff --git a/apps/android/app/src/main/java/chat/simplex/app/views/call/WebRTC.kt b/apps/android/app/src/main/java/chat/simplex/app/views/call/WebRTC.kt
index 94ab0ad4c6..e8199721ac 100644
--- a/apps/android/app/src/main/java/chat/simplex/app/views/call/WebRTC.kt
+++ b/apps/android/app/src/main/java/chat/simplex/app/views/call/WebRTC.kt
@@ -93,7 +93,7 @@ sealed class WCallResponse {
 @Serializable class WebRTCSession(val rtcSession: String, val rtcIceCandidates: String)
 @Serializable class WebRTCExtraInfo(val rtcIceCandidates: String)
 @Serializable class CallType(val media: CallMediaType, val capabilities: CallCapabilities)
-@Serializable class RcvCallInvitation(val contact: Contact, val callType: CallType, val sharedKey: String?, val callTs: Instant) {
+@Serializable class RcvCallInvitation(val contact: Contact, val callType: CallType, val sharedKey: String? = null, val callTs: Instant) {
   val callTypeText: String get() = generalGetString(when(callType.media) {
     CallMediaType.Video -> if (sharedKey == null) R.string.video_call_no_encryption else R.string.encrypted_video_call
     CallMediaType.Audio -> if (sharedKey == null) R.string.audio_call_no_encryption else R.string.encrypted_audio_call