diff --git a/include/setupapi.h b/include/setupapi.h
index 818cc12599a..48060edf914 100644
--- a/include/setupapi.h
+++ b/include/setupapi.h
@@ -1615,7 +1615,7 @@ BOOL     WINAPI SetupDiOpenDeviceInfoW(HDEVINFO, PCWSTR, HWND, DWORD, PSP_DEVINF
 BOOL     WINAPI SetupDiOpenDeviceInterfaceA(HDEVINFO, PCSTR, DWORD, PSP_DEVICE_INTERFACE_DATA);
 BOOL     WINAPI SetupDiOpenDeviceInterfaceW(HDEVINFO, PCWSTR, DWORD, PSP_DEVICE_INTERFACE_DATA);
 #define         SetupDiOpenDeviceInterface WINELIB_NAME_AW(SetupDiOpenDeviceInterface)
-BOOL     WINAPI SetupDiOpenDeviceInterfaceRegKey(HDEVINFO, PSP_DEVINFO_DATA, DWORD, REGSAM);
+HKEY     WINAPI SetupDiOpenDeviceInterfaceRegKey(HDEVINFO, PSP_DEVICE_INTERFACE_DATA, DWORD, REGSAM);
 HKEY     WINAPI SetupDiOpenDevRegKey(HDEVINFO, PSP_DEVINFO_DATA, DWORD, DWORD, DWORD, REGSAM);
 BOOL     WINAPI SetupDiRegisterCoDeviceInstallers(HDEVINFO, PSP_DEVINFO_DATA);
 BOOL     WINAPI SetupDiRegisterDeviceInfo(HDEVINFO, PSP_DEVINFO_DATA, DWORD, PSP_DETSIG_CMPPROC, PVOID, PSP_DEVINFO_DATA);