diff --git a/internal/instance/resource_instance.go b/internal/instance/resource_instance.go
index c3c94b9..50f306f 100644
--- a/internal/instance/resource_instance.go
+++ b/internal/instance/resource_instance.go
@@ -1080,7 +1080,7 @@ func waitForState(ctx context.Context, refreshFunc retry.StateRefreshFunc, targe
 // for virtual machines, which can report this metric only if the Incus agent has
 // started and has established a connection to the Incus server.
 func isInstanceOperational(s api.InstanceState) bool {
-	return isInstanceRunning(s) && s.Processes > 0
+	return isInstanceRunning(s) && s.Pid > 0
 }
 
 // isInstanceRunning returns true if its status is either "Running" or "Ready".