diff --git a/reactos/hal/halx86/xbox/halinit_xbox.c b/reactos/hal/halx86/xbox/halinit_xbox.c
index 28e3342c755..80f3cb6c94e 100644
--- a/reactos/hal/halx86/xbox/halinit_xbox.c
+++ b/reactos/hal/halx86/xbox/halinit_xbox.c
@@ -18,6 +18,16 @@
 
 /* FUNCTIONS ***************************************************************/
 
+VOID
+NTAPI
+HalpInitProcessor(
+    IN ULONG ProcessorNumber,
+    IN PLOADER_PARAMETER_BLOCK LoaderBlock)
+{
+    /* Set default IDR */
+    KeGetPcr()->IDR = 0xFFFFFFFB;
+}
+
 VOID
 HalpInitPhase0(PLOADER_PARAMETER_BLOCK LoaderBlock)
 {