diff --git a/app/src/main/java/org/linphone/ui/call/viewmodel/CurrentCallViewModel.kt b/app/src/main/java/org/linphone/ui/call/viewmodel/CurrentCallViewModel.kt
index da1ed8d73..3e14ba588 100644
--- a/app/src/main/java/org/linphone/ui/call/viewmodel/CurrentCallViewModel.kt
+++ b/app/src/main/java/org/linphone/ui/call/viewmodel/CurrentCallViewModel.kt
@@ -652,17 +652,19 @@ class CurrentCallViewModel @UiThread constructor() : GenericViewModel() {
     @UiThread
     fun refreshMicrophoneState() {
         coreContext.postOnCoreThread {
-            val micMuted = if (currentCall.conference != null) {
-                currentCall.conference?.microphoneMuted ?: false
-            } else {
-                currentCall.microphoneMuted
+            if (::currentCall.isInitialized) {
+                val micMuted = if (currentCall.conference != null) {
+                    currentCall.conference?.microphoneMuted ?: false
+                } else {
+                    currentCall.microphoneMuted
+                }
+                if (currentCall.conference != null) {
+                    currentCall.conference?.microphoneMuted = !micMuted
+                } else {
+                    currentCall.microphoneMuted = !micMuted
+                }
+                isMicrophoneMuted.postValue(micMuted)
             }
-            if (currentCall.conference != null) {
-                currentCall.conference?.microphoneMuted = !micMuted
-            } else {
-                currentCall.microphoneMuted = !micMuted
-            }
-            isMicrophoneMuted.postValue(micMuted)
         }
     }