diff --git a/app/src/main/java/org/linphone/ui/main/sso/viewmodel/SingleSignOnViewModel.kt b/app/src/main/java/org/linphone/ui/main/sso/viewmodel/SingleSignOnViewModel.kt
index a0fe73c77..80e468920 100644
--- a/app/src/main/java/org/linphone/ui/main/sso/viewmodel/SingleSignOnViewModel.kt
+++ b/app/src/main/java/org/linphone/ui/main/sso/viewmodel/SingleSignOnViewModel.kt
@@ -345,9 +345,9 @@ class SingleSignOnViewModel
                 onErrorEvent.postValue(Event("Invalid access token expiration time"))
             } else {
                 val accessToken =
-                    Factory.instance().createBearerToken(authState.accessToken, expire / 1000) // Linphone timestamps are in seconds
+                    Factory.instance().createBearerToken(authState.accessToken.orEmpty(), expire / 1000) // Linphone timestamps are in seconds
                 val refreshToken =
-                    Factory.instance().createBearerToken(authState.refreshToken, expire / 1000) // Linphone timestamps are in seconds
+                    Factory.instance().createBearerToken(authState.refreshToken.orEmpty(), expire / 1000) // Linphone timestamps are in seconds
 
                 val authInfo = coreContext.bearerAuthInfoPendingPasswordUpdate
                 if (authInfo == null) {