diff --git a/__test__/input-helper.test.ts b/__test__/input-helper.test.ts
index 9514cb4..fcb242a 100644
--- a/__test__/input-helper.test.ts
+++ b/__test__/input-helper.test.ts
@@ -80,6 +80,7 @@ describe('input-helper tests', () => {
     expect(settings.commit).toBeTruthy()
     expect(settings.commit).toBe('1234567890123456789012345678901234567890')
     expect(settings.filter).toBe(undefined)
+    expect(settings.defaultBranchCheckout).toBe(false)
     expect(settings.sparseCheckout).toBe(undefined)
     expect(settings.sparseCheckoutConeMode).toBe(true)
     expect(settings.fetchDepth).toBe(1)
diff --git a/dist/index.js b/dist/index.js
index 77146ce..6712e8f 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -1741,7 +1741,7 @@ function getInputs() {
         core.debug(`commit = '${result.commit}'`);
         // Default branch checkout
         result.defaultBranchCheckout =
-            (core.getInput('default-branch-checkout') || 'true').toUpperCase() ===
+            (core.getInput('default-branch-checkout') || 'false').toUpperCase() ===
                 'TRUE';
         core.debug(`default-branch-checkout = '${result.defaultBranchCheckout}'`);
         // Clean
diff --git a/src/input-helper.ts b/src/input-helper.ts
index b89a523..11ea294 100644
--- a/src/input-helper.ts
+++ b/src/input-helper.ts
@@ -80,7 +80,7 @@ export async function getInputs(): Promise<IGitSourceSettings> {
 
   // Default branch checkout
   result.defaultBranchCheckout =
-    (core.getInput('default-branch-checkout') || 'true').toUpperCase() ===
+    (core.getInput('default-branch-checkout') || 'false').toUpperCase() ===
     'TRUE'
   core.debug(`default-branch-checkout = '${result.defaultBranchCheckout}'`)