diff --git a/dlls/user32/user32.spec b/dlls/user32/user32.spec
index 7e4ce3311f0..8bf9ad1c2f8 100644
--- a/dlls/user32/user32.spec
+++ b/dlls/user32/user32.spec
@@ -614,7 +614,7 @@
 @ stub SetCursorContents
 @ stdcall SetCursorPos(long long)
 @ stdcall SetDebugErrorLevel(long)
-@ stdcall SetDeskWallPaper(str)
+@ stdcall SetDeskWallPaper(ptr)
 # @ stub SetDeskWallpaper
 # @ stub SetDesktopBitmap
 @ stdcall SetDlgItemInt(long long long long)