diff --git a/reactos/drivers/bus/acpi/ospm/osl.c b/reactos/drivers/bus/acpi/ospm/osl.c
index 741f0714c91..ed11cd6d630 100644
--- a/reactos/drivers/bus/acpi/ospm/osl.c
+++ b/reactos/drivers/bus/acpi/ospm/osl.c
@@ -601,5 +601,5 @@ acpi_os_writable(void *ptr, u32 len)
 u32
 acpi_os_get_thread_id (void)
 {
-  return (ULONG)PsGetCurrentThreadId();
+  return (ULONG)PsGetCurrentThreadId() + 1;
 }
diff --git a/reactos/drivers/bus/acpi/utils/cmglobal.c b/reactos/drivers/bus/acpi/utils/cmglobal.c
index 121bcda9a8f..c2d1237fef5 100644
--- a/reactos/drivers/bus/acpi/utils/cmglobal.c
+++ b/reactos/drivers/bus/acpi/utils/cmglobal.c
@@ -389,6 +389,7 @@ acpi_cm_init_globals (
 		acpi_gbl_acpi_mutex_info[i].mutex   = NULL;
 		acpi_gbl_acpi_mutex_info[i].locked  = FALSE;
 		acpi_gbl_acpi_mutex_info[i].use_count = 0;
+		acpi_gbl_acpi_mutex_info[i].owner_id = 0;
 	}
 
 	/* Global notify handlers */