diff --git a/dlls/kernelbase/security.c b/dlls/kernelbase/security.c
index 97943048b01..36196304db3 100644
--- a/dlls/kernelbase/security.c
+++ b/dlls/kernelbase/security.c
@@ -662,21 +662,21 @@ BOOL WINAPI CreateRestrictedToken( HANDLE token, DWORD flags,
     {
         if (!(nt_disable_sids = heap_alloc( offsetof( TOKEN_GROUPS, Groups[disable_sid_count] ) ))) goto out;
         nt_disable_sids->GroupCount = disable_sid_count;
-        memcpy( nt_disable_sids->Groups, disable_sids, disable_sid_count * sizeof(SID_AND_ATTRIBUTES) );
+        memcpy( nt_disable_sids->Groups, disable_sids, disable_sid_count * sizeof(*disable_sids) );
     }
 
     if (delete_priv_count)
     {
         if (!(nt_privs = heap_alloc( offsetof( TOKEN_GROUPS, Groups[delete_priv_count] ) ))) goto out;
         nt_privs->PrivilegeCount = delete_priv_count;
-        memcpy( nt_privs->Privileges, delete_privs, delete_priv_count * sizeof(SID_AND_ATTRIBUTES) );
+        memcpy( nt_privs->Privileges, delete_privs, delete_priv_count * sizeof(*delete_privs) );
     }
 
     if (restrict_sid_count)
     {
         if (!(nt_restrict_sids = heap_alloc( offsetof( TOKEN_GROUPS, Groups[restrict_sid_count] ) ))) goto out;
         nt_restrict_sids->GroupCount = restrict_sid_count;
-        memcpy( nt_restrict_sids->Groups, restrict_sids, restrict_sid_count * sizeof(SID_AND_ATTRIBUTES) );
+        memcpy( nt_restrict_sids->Groups, restrict_sids, restrict_sid_count * sizeof(*restrict_sids) );
     }
 
     status = NtFilterToken(token, flags, nt_disable_sids, nt_privs, nt_restrict_sids, ret);