diff --git a/client/packages/lowcoder/src/comps/comps/textInputComp/textInputConstants.test.tsx b/client/packages/lowcoder/src/comps/comps/textInputComp/textInputConstants.test.tsx
index 3466b486f..e724b3e05 100644
--- a/client/packages/lowcoder/src/comps/comps/textInputComp/textInputConstants.test.tsx
+++ b/client/packages/lowcoder/src/comps/comps/textInputComp/textInputConstants.test.tsx
@@ -79,4 +79,16 @@ test("textInputValidate", () => {
     validateStatus: "error",
     help: trans("validationDesc.maxLength", { length: 4, maxLength: 2 }),
   });
+
+  expect(
+    textInputValidate({
+      value: { value: "" },
+      required: false,
+      minLength: 0,
+      maxLength: 0,
+      validationType: "Regex",
+      regex: new RegExp("^.*$"),
+      customRule: "",
+    })
+  ).toMatchObject({ validateStatus: "" });
 });
diff --git a/client/packages/lowcoder/src/comps/controls/codeControl.tsx b/client/packages/lowcoder/src/comps/controls/codeControl.tsx
index 7daa097d5..36788b842 100644
--- a/client/packages/lowcoder/src/comps/controls/codeControl.tsx
+++ b/client/packages/lowcoder/src/comps/controls/codeControl.tsx
@@ -281,7 +281,8 @@ function toRegExp(value: unknown): RegExp {
     return value as RegExp;
   } else if (valueType === "string") {
     const regexStr = trimStart(value as string, "^");
-    return new RegExp("^" + (regexStr ?? ".*") + "$");
+    const finalRegexStr = regexStr || ".*";
+    return new RegExp("^" + finalRegexStr + "$");
   }
   throw new TypeError(
     `must be a valid JavaScript regular expression without forward slashes around the pattern`