diff --git a/lib/create-form.js b/lib/create-form.js
index 402bd2a..4ff73f9 100644
--- a/lib/create-form.js
+++ b/lib/create-form.js
@@ -115,7 +115,7 @@ export const createForm = (config) => {
         return Promise.resolve()
           .then(() => validateFunction(values))
           .then((error) => {
-            if (error == null || !util.getValues(error).length) {
+            if (util.isNullish(error) || util.getValues(error).length === 0) {
               clearErrorsAndSubmit(values);
             } else {
               errors.set(error);