diff --git a/xtoskrnl/hl/pic.c b/xtoskrnl/hl/pic.c
index 281e47f..9b66c67 100644
--- a/xtoskrnl/hl/pic.c
+++ b/xtoskrnl/hl/pic.c
@@ -254,7 +254,7 @@ 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 18a1c17..4ccaed8 100644
--- a/xtoskrnl/includes/hl.h
+++ b/xtoskrnl/includes/hl.h
@@ -103,7 +103,7 @@ HlpHandlePicSpuriousService();
 
 XTAPI
 VOID
-HlpInitializeApic();
+HlpInitializeApic(VOID);
 
 XTFASTCALL
 KRUNLEVEL