diff --git a/xtoskrnl/hl/pic.c b/xtoskrnl/hl/pic.c
index e1c5b09..1c24d62 100644
--- a/xtoskrnl/hl/pic.c
+++ b/xtoskrnl/hl/pic.c
@@ -140,7 +140,7 @@ HlpHandlePicSpuriousService()
  */
 XTAPI
 VOID
-HlpInitializeApic()
+HlpInitializeApic(VOID)
 {
     APIC_BASE_REGISTER BaseRegister;
     APIC_LVT_REGISTER LvtRegister;
diff --git a/xtoskrnl/includes/hl.h b/xtoskrnl/includes/hl.h
index 215d208..78301b0 100644
--- a/xtoskrnl/includes/hl.h
+++ b/xtoskrnl/includes/hl.h
@@ -83,7 +83,7 @@ HlpHandlePicSpuriousService();
 
 XTAPI
 VOID
-HlpInitializeApic();
+HlpInitializeApic(VOID);
 
 XTFASTCALL
 KRUNLEVEL