diff --git a/reactos/lib/advapi32/advapi32.def b/reactos/lib/advapi32/advapi32.def
index 31f361dc560..ea60f206513 100644
--- a/reactos/lib/advapi32/advapi32.def
+++ b/reactos/lib/advapi32/advapi32.def
@@ -414,7 +414,7 @@ MD5Update@12
 MakeAbsoluteSD@44
 ;MakeAbsoluteSD2
 MakeSelfRelativeSD@12
-MapGenericMask@8=NTDLL.MapGenericMask
+MapGenericMask@8=NTDLL.RtlMapGenericMask
 ;NotifyBootConfigStatus@4
 NotifyChangeEventLog@8
 ObjectCloseAuditAlarmA@12