diff --git a/basis/windows/directx/dinput/dinput.factor b/basis/windows/directx/dinput/dinput.factor
index 2a7ae19ecc..56cd4937ce 100644
--- a/basis/windows/directx/dinput/dinput.factor
+++ b/basis/windows/directx/dinput/dinput.factor
@@ -72,7 +72,7 @@ STRUCT: DICONFIGUREDEVICESPARAMSW
     { dics           DICOLORSET        }
     { lpUnkDDSTarget IUnknown*         } ;
 TYPEDEF: DICONFIGUREDEVICESPARAMSW* LPDICONFIGUREDEVICESPARAMSW
-TYPEDEF: DICONFIGUREDEVICESPARAMSW* LPDICONFIGUREDEVICESPARAMSW
+TYPEDEF: DICONFIGUREDEVICESPARAMSW* LPCDICONFIGUREDEVICESPARAMSW
 
 STRUCT: DIDEVCAPS
     { dwSize DWORD }