diff --git a/xtoskrnl/hl/x86/cpu.c b/xtoskrnl/hl/x86/cpu.c
index 7aff72d..b585ca6 100644
--- a/xtoskrnl/hl/x86/cpu.c
+++ b/xtoskrnl/hl/x86/cpu.c
@@ -51,7 +51,7 @@ XTSTATUS
 HlStartProcessor(IN ULONG CpuId,
                  IN PHYSICAL_ADDRESS EntryPoint)
 {
-    ULONG Attempt;
+    UCHAR Attempt;
 
     /* Wait until command register is clear */
     while((HlReadApicRegister(APIC_ICR0) & APIC_DELIVERY_PENDING) != 0);