diff --git a/app/Http/Controllers/Budget/AvailableBudgetController.php b/app/Http/Controllers/Budget/AvailableBudgetController.php
index 94994bfdf3..6c2d9cdd69 100644
--- a/app/Http/Controllers/Budget/AvailableBudgetController.php
+++ b/app/Http/Controllers/Budget/AvailableBudgetController.php
@@ -185,7 +185,7 @@ class AvailableBudgetController extends Controller
 
             return redirect(route('budgets.index', [$start->format('Y-m-d'), $end->format('Y-m-d')]));
         }
-        if (0 === bccomp('0', $amount)) {
+        if (bccomp($amount, '0') <= 0) {
             session()->flash('error', trans('firefly.invalid_amount'));
 
             return redirect(route('budgets.index', [$start->format('Y-m-d'), $end->format('Y-m-d')]));
@@ -238,7 +238,7 @@ class AvailableBudgetController extends Controller
 
             return redirect(route('budgets.index', [$start->format('Y-m-d'), $end->format('Y-m-d')]));
         }
-        if (0 === bccomp('0', $amount)) {
+        if (bccomp($amount, '0') <= 0) {
             session()->flash('error', trans('firefly.invalid_amount'));
 
             return redirect(route('budgets.index', [$start->format('Y-m-d'), $end->format('Y-m-d')]));