diff --git a/programs/winecfg/audio.c b/programs/winecfg/audio.c
index 5cf2b34c08c..c5cebcd7d84 100644
--- a/programs/winecfg/audio.c
+++ b/programs/winecfg/audio.c
@@ -51,7 +51,7 @@ WINE_DEFAULT_DEBUG_CHANNEL(winecfg);
 #define DEVICE_MASK 0x40000000
 #define MAX_NAME_LENGTH 64
 
-typedef DWORD (WINAPI * MessagePtr)(UINT, UINT, DWORD, DWORD, DWORD);
+typedef DWORD (WINAPI * MessagePtr)(UINT, UINT, DWORD_PTR, DWORD_PTR, DWORD_PTR);
 
 static struct DSOUNDACCEL
 {