diff --git a/reactos/ntoskrnl/ob/security.c b/reactos/ntoskrnl/ob/security.c
index 08b2528e63f..c17aea6dee0 100644
--- a/reactos/ntoskrnl/ob/security.c
+++ b/reactos/ntoskrnl/ob/security.c
@@ -319,10 +319,10 @@ NtSetSecurityObject(IN HANDLE Handle,
   PSECURITY_DESCRIPTOR NewSd;
   POBJECT_HEADER Header;
   PVOID Object;
-  PSID Owner;
-  PSID Group;
-  PACL Dacl;
-  PACL Sacl;
+  PSID Owner = 0;
+  PSID Group = 0;
+  PACL Dacl = 0;
+  PACL Sacl = 0;
   ULONG OwnerLength = 0;
   ULONG GroupLength = 0;
   ULONG DaclLength = 0;