diff --git a/.github/workflows/golang-test-windows.yml b/.github/workflows/golang-test-windows.yml
index 4f58066f2..2a8c684dd 100644
--- a/.github/workflows/golang-test-windows.yml
+++ b/.github/workflows/golang-test-windows.yml
@@ -18,7 +18,7 @@ jobs:
       - uses: actions/upload-artifact@v2
         with:
           name: syso
-          path: client/*.syso
+          path: client/*.dll
 
   test:
     needs: pre
diff --git a/client/wintun_386.dll b/client/wintun_386.dll
new file mode 100644
index 000000000..2ab97dba0
Binary files /dev/null and b/client/wintun_386.dll differ
diff --git a/client/wintun_amd64.dll b/client/wintun_amd64.dll
new file mode 100644
index 000000000..aee04e77b
Binary files /dev/null and b/client/wintun_amd64.dll differ
diff --git a/client/wintun_arm64.dll b/client/wintun_arm64.dll
new file mode 100644
index 000000000..dc4e4aeeb
Binary files /dev/null and b/client/wintun_arm64.dll differ
diff --git a/iface/tun_windows.go b/iface/tun_windows.go
index f5530dfa7..f8fc67aa5 100644
--- a/iface/tun_windows.go
+++ b/iface/tun_windows.go
@@ -60,7 +60,7 @@ func (c *tunDevice) createWithUserspace() (NetInterface, error) {
 
 	uapi, err := c.getUAPI(c.name)
 	if err != nil {
-		return tunIface, err
+		return nil, err
 	}
 
 	go func() {