diff --git a/reactos/hal/halx86/xbox/display_xbox.c b/reactos/hal/halx86/xbox/display_xbox.c
index 3d1a070cc3d..be52bd2a5fb 100644
--- a/reactos/hal/halx86/xbox/display_xbox.c
+++ b/reactos/hal/halx86/xbox/display_xbox.c
@@ -284,7 +284,7 @@ I2CTransmitByteGetReturn(UCHAR bPicAddressI2cFormat, UCHAR bDataToWrite, ULONG *
 }
 
 VOID FASTCALL
-HalInitializeDisplay (PROS_LOADER_PARAMETER_BLOCK LoaderBlock)
+HalInitializeDisplay (PLOADER_PARAMETER_BLOCK LoaderBlock)
 /*
  * FUNCTION: Initalize the display
  * ARGUMENTS: