diff --git a/reactos/dll/win32/netapi32/local_group.c b/reactos/dll/win32/netapi32/local_group.c
index 1b00ea2da6e..798248d8fcc 100644
--- a/reactos/dll/win32/netapi32/local_group.c
+++ b/reactos/dll/win32/netapi32/local_group.c
@@ -103,7 +103,7 @@ BuildAliasInfoBuffer(PALIAS_GENERAL_INFORMATION AliasInfo,
         case 0:
             LocalInfo0 = (PLOCALGROUP_INFO_0)LocalBuffer;
 
-            Ptr = (LPWSTR)LocalInfo0++;
+            Ptr = (LPWSTR)((ULONG_PTR)LocalInfo0 + sizeof(LOCALGROUP_INFO_0));
             LocalInfo0->lgrpi0_name = Ptr;
 
             memcpy(LocalInfo0->lgrpi0_name,