diff --git a/reactos/iface/addsys/w32ksvc.db b/reactos/iface/addsys/w32ksvc.db
index bc2e8df47e7..e5f93e945bd 100644
--- a/reactos/iface/addsys/w32ksvc.db
+++ b/reactos/iface/addsys/w32ksvc.db
@@ -456,6 +456,7 @@ NtUserPostThreadMessage                 4
 NtUserQuerySendMessage                  1
 NtUserQueryUserCounters                 5
 NtUserQueryWindow                       2
+NtUserReleaseDC				2
 NtUserRealChildWindowFromPoint          3
 NtUserRedrawWindow                      4
 NtUserRegisterClassExWOW                5