diff --git a/as.go b/as.go
index 6d5d6ee..2f834e1 100644
--- a/as.go
+++ b/as.go
@@ -41,8 +41,7 @@ func T[To Number](v any) (To, error) {
 		err error
 		out To
 	)
-
-	switch any(out).(type) {
+	switch any(indirect(out)).(type) {
 	case int:
 		var n int
 		n, err = Int(v)
diff --git a/as_test.go b/as_test.go
index fb96f50..4304007 100644
--- a/as_test.go
+++ b/as_test.go
@@ -54,11 +54,19 @@ func TestTCustomType(t *testing.T) {
 	assertNoError(t, as.T[int], aliasedInt(math.MinInt64))
 }
 
+func TestTIntoCustomType(t *testing.T) {
+	type aliasedInt int
+	type aliasedIntOut int
+
+	assertNoError(t, as.T[aliasedIntOut], aliasedInt(math.MaxInt64))
+	assertNoError(t, as.T[aliasedIntOut], aliasedInt(math.MinInt64))
+}
+
 var out int
 
 // BenchmarkT-8   	91144112	        12.90 ns/op	       8 B/op	       0 allocs/op
 // After changes to indirect:
-// BenchmarkT-8   	40429498	        29.37 ns/op	      16 B/op	       1 allocs/op
+// BenchmarkT-8   	24196993	        49.55 ns/op	      24 B/op	       2 allocs/op
 func BenchmarkT(b *testing.B) {
 	var t int
 	for n := 0; n < b.N; n++ {