diff --git a/xtoskrnl/hl/amd64/runlevel.c b/xtoskrnl/hl/amd64/runlevel.c
index d67b5d5e..5979a485 100644
--- a/xtoskrnl/hl/amd64/runlevel.c
+++ b/xtoskrnl/hl/amd64/runlevel.c
@@ -18,7 +18,7 @@
  */
 XTFASTCALL
 KRUNLEVEL
-HlGetRunLevel()
+HlGetRunLevel(VOID)
 {
     return (KRUNLEVEL)ArReadControlRegister(8);
 }
diff --git a/xtoskrnl/hl/i686/runlevel.c b/xtoskrnl/hl/i686/runlevel.c
index 8a22b35f..b4fad236 100644
--- a/xtoskrnl/hl/i686/runlevel.c
+++ b/xtoskrnl/hl/i686/runlevel.c
@@ -18,7 +18,7 @@
  */
 XTFASTCALL
 KRUNLEVEL
-HlGetRunLevel()
+HlGetRunLevel(VOID)
 {
     return HlpTransformApicTprToRunLevel(HlReadApicRegister(APIC_TPR));
 }
diff --git a/xtoskrnl/includes/hl.h b/xtoskrnl/includes/hl.h
index fb72c9b7..6ff39d15 100644
--- a/xtoskrnl/includes/hl.h
+++ b/xtoskrnl/includes/hl.h
@@ -42,7 +42,7 @@ HlDrawPixel(IN ULONG PosX,
 
 XTFASTCALL
 KRUNLEVEL
-HlGetRunLevel();
+HlGetRunLevel(VOID);
 
 
 XTCDECL
diff --git a/xtoskrnl/includes/ke.h b/xtoskrnl/includes/ke.h
index 0dd8e0b9..39fab336 100644
--- a/xtoskrnl/includes/ke.h
+++ b/xtoskrnl/includes/ke.h
@@ -19,11 +19,11 @@ KeClearEvent(IN PKEVENT Event);
 
 XTFASTCALL
 KRUNLEVEL
-KeGetCurrentRunLevel();
+KeGetCurrentRunLevel(VOID);
 
 XTAPI
 VOID
-KeHaltSystem();
+KeHaltSystem(VOID);
 
 XTAPI
 VOID
diff --git a/xtoskrnl/ke/panic.c b/xtoskrnl/ke/panic.c
index d9cbd0b8..192a747e 100644
--- a/xtoskrnl/ke/panic.c
+++ b/xtoskrnl/ke/panic.c
@@ -18,7 +18,7 @@
  */
 XTAPI
 VOID
-KeHaltSystem()
+KeHaltSystem(VOID)
 {
     /* Enter infinite loop */
     for(;;)
diff --git a/xtoskrnl/ke/runlevel.c b/xtoskrnl/ke/runlevel.c
index dee28b02..4a6a548e 100644
--- a/xtoskrnl/ke/runlevel.c
+++ b/xtoskrnl/ke/runlevel.c
@@ -18,7 +18,7 @@
  */
 XTFASTCALL
 KRUNLEVEL
-KeGetCurrentRunLevel()
+KeGetCurrentRunLevel(VOID)
 {
     return HlGetRunLevel();
 }