diff --git a/kernel/trunk/core/heap.inc b/kernel/trunk/core/heap.inc
index 6f8dcd7626..9f7021dc57 100644
--- a/kernel/trunk/core/heap.inc
+++ b/kernel/trunk/core/heap.inc
@@ -635,7 +635,8 @@ proc kernel_free stdcall, base:dword
            pop esi ebx
            ret
 .fail:
-           and [heap_mutex], 0
+           xor eax, eax
+           mov [heap_mutex], eax
            pop esi ebx
            ret
 endp
diff --git a/kernel/trunk/core/peload.inc b/kernel/trunk/core/peload.inc
index d0c844cd57..85fede96b6 100644
--- a/kernel/trunk/core/peload.inc
+++ b/kernel/trunk/core/peload.inc
@@ -321,6 +321,7 @@ __exports:
           user_free,             'UserFree',           \      ; stdcall
           unmap_pages,           'UnmapPages',         \      ; eax, ecx
           sys_msg_board_str,     'SysMsgBoardStr',     \
+          get_timer_ticks,       'GetTimerTicks',      \
           delay_hs,              'Delay',              \      ; ebx
           set_mouse_data,        'SetMouseData'