diff --git a/app/Http/Livewire/StandPredictorForm.php b/app/Http/Livewire/StandPredictorForm.php
index 74a2da59e..7334b03f3 100644
--- a/app/Http/Livewire/StandPredictorForm.php
+++ b/app/Http/Livewire/StandPredictorForm.php
@@ -60,7 +60,7 @@ public function getFormSchema(): array
     public function submit(): void
     {
         // Convert the callsign to uppercase before validating it.
-        $this->callsign = strtoupper($this->callsign);
+        $this->departureAirfield = strtoupper($this->departureAirfield);
 
         $this->form->validate();
         $this->emit('standPredictorFormSubmitted', [