diff --git a/reactos/hal/hal/hal.c b/reactos/hal/hal/hal.c
index bd6cf5b0d04..5833bc6bace 100644
--- a/reactos/hal/hal/hal.c
+++ b/reactos/hal/hal/hal.c
@@ -584,15 +584,13 @@ HalStartNextProcessor(IN PLOADER_PARAMETER_BLOCK LoaderBlock,
 }
 
 
-ULONG
+UCHAR
 FASTCALL
-HalSystemVectorDispatchEntry(
-  ULONG Unknown1,
-  ULONG Unknown2,
-  ULONG Unknown3)
+HalSystemVectorDispatchEntry(IN ULONG Vector,
+                             OUT PKINTERRUPT_ROUTINE **FlatDispatch,
+                             OUT PKINTERRUPT_ROUTINE *NoConnection)
 {
   UNIMPLEMENTED;
-
   return 0;
 }