diff --git a/packages/cozy-client/src/helpers/urlHelper.js b/packages/cozy-client/src/helpers/urlHelper.js
index 171e7e49ee..6c7c77dbca 100644
--- a/packages/cozy-client/src/helpers/urlHelper.js
+++ b/packages/cozy-client/src/helpers/urlHelper.js
@@ -44,7 +44,7 @@ export const generateWebLink = ({
           .split('.')
           .map((x, i) => (i === 0 ? x + '-' + slug : x))
           .join('.')
-  url.pathname = pathname
+  url.pathname = ensureFirstSlash(pathname)
   url.hash = ensureFirstSlash(hash)
 
   for (const [param, value] of searchParams) {
diff --git a/packages/cozy-client/src/helpers/urlHelper.spec.js b/packages/cozy-client/src/helpers/urlHelper.spec.js
index 3e2e4ba5cb..2ece4a46d6 100644
--- a/packages/cozy-client/src/helpers/urlHelper.spec.js
+++ b/packages/cozy-client/src/helpers/urlHelper.spec.js
@@ -40,6 +40,18 @@ describe('generateWebLink', () => {
       })
     ).toEqual(`https://drive.alice.cozy.tools/public/#/files/432432`)
   })
+
+  it('should handle undefined pathname', () => {
+    expect(
+      generateWebLink({
+        cozyUrl: 'https://alice.cozy.tools',
+        pathname: undefined,
+        hash: 'files/432432',
+        slug: 'drive',
+        subDomainType: 'nested'
+      })
+    ).toEqual(`https://drive.alice.cozy.tools/#/files/432432`)
+  })
 })
 
 describe('deconstructWebLink', () => {