diff --git a/arbitrary/gen_for_kind.go b/arbitrary/gen_for_kind.go
index 0912261..c27961c 100644
--- a/arbitrary/gen_for_kind.go
+++ b/arbitrary/gen_for_kind.go
@@ -337,8 +337,6 @@ func (a *Arbitraries) genForKind(rt reflect.Type) gopter.Gen {
 		keyGen := a.GenForType(rt.Key())
 		valueGen := a.GenForType(rt.Elem())
 		return gen.MapOf(keyGen, valueGen)
-	default:
-		panic(fmt.Sprintf("Unsupported GenForType: %v", rt.Kind()))
 	}
 	return nil
 }