diff --git a/src/add-ons/kernel/bus_managers/acpi/acpica/components/utilities/utdelete.c b/src/add-ons/kernel/bus_managers/acpi/acpica/components/utilities/utdelete.c
index 31675fa88b..ea2033b0e1 100644
--- a/src/add-ons/kernel/bus_managers/acpi/acpica/components/utilities/utdelete.c
+++ b/src/add-ons/kernel/bus_managers/acpi/acpica/components/utilities/utdelete.c
@@ -259,7 +259,7 @@ AcpiUtDeleteInternalObj (
             /* Global Lock has extra semaphore */
 
             (void) AcpiOsDeleteSemaphore (AcpiGbl_GlobalLockSemaphore);
-            AcpiGbl_GlobalLockSemaphore = 0;
+            AcpiGbl_GlobalLockSemaphore = NULL;
 
             AcpiOsDeleteMutex (Object->Mutex.OsMutex);
             AcpiGbl_GlobalLockMutex = NULL;
diff --git a/src/add-ons/kernel/bus_managers/acpi/acpica/components/utilities/utinit.c b/src/add-ons/kernel/bus_managers/acpi/acpica/components/utilities/utinit.c
index 0759ef34ba..8df027765e 100644
--- a/src/add-ons/kernel/bus_managers/acpi/acpica/components/utilities/utinit.c
+++ b/src/add-ons/kernel/bus_managers/acpi/acpica/components/utilities/utinit.c
@@ -283,7 +283,7 @@ AcpiUtInitGlobals (
 
     /* Global Lock support */
 
-    AcpiGbl_GlobalLockSemaphore         = 0;
+    AcpiGbl_GlobalLockSemaphore         = NULL;
     AcpiGbl_GlobalLockMutex             = NULL;
     AcpiGbl_GlobalLockAcquired          = FALSE;
     AcpiGbl_GlobalLockHandle            = 0;