diff --git a/generic.go b/generic.go
index fdf6f48..d917ea8 100644
--- a/generic.go
+++ b/generic.go
@@ -1,3 +1,6 @@
+//go:build go1.18
+// +build go1.18
+
 package pointer
 
 func To[T any](t T) *T {
@@ -5,7 +8,7 @@ func To[T any](t T) *T {
 }
 
 func ToOrNil[T comparable](t T) *T {
-	if z, ok := interface{}(t).(interface{ IsZero() bool }); ok {
+	if z, ok := any(t).(interface{ IsZero() bool }); ok {
 		if z.IsZero() {
 			return nil
 		}
diff --git a/generic_test.go b/generic_test.go
new file mode 100644
index 0000000..154a59b
--- /dev/null
+++ b/generic_test.go
@@ -0,0 +1,33 @@
+//go:build go1.18
+// +build go1.18
+
+package pointer
+
+import (
+	"testing"
+	"time"
+)
+
+func TestGeneric(t *testing.T) {
+	var x time.Time
+	if *To(x) != x {
+		t.Errorf("*To(%v)", x)
+	}
+	if ToOrNil(x) != nil {
+		t.Errorf("ToOrNil(%v)", x)
+	}
+	if Get((*time.Time)(nil)) != x {
+		t.Errorf("Time(%v)", nil)
+	}
+
+	x = time.Date(2014, 6, 25, 12, 24, 40, 0, time.UTC)
+	if *To(x) != x {
+		t.Errorf("*To(%v)", x)
+	}
+	if *ToOrNil(x) != x {
+		t.Errorf("*ToOrNil(%v)", x)
+	}
+	if Get(&x) != x {
+		t.Errorf("Get(%v)", &x)
+	}
+}
diff --git a/go.mod b/go.mod
index 1d40808..07e2025 100644
--- a/go.mod
+++ b/go.mod
@@ -1,3 +1,3 @@
 module github.com/AlekSi/pointer
 
-go 1.11
+go 1.18