diff --git a/dlls/advapi32/security.c b/dlls/advapi32/security.c
index 3c2665494e1..59275c8cc5a 100644
--- a/dlls/advapi32/security.c
+++ b/dlls/advapi32/security.c
@@ -2578,6 +2578,11 @@ BOOL WINAPI LookupAccountNameW( LPCWSTR lpSystemName, LPCWSTR lpAccountName, PSI
 
     *cchReferencedDomainName = strlenW(dm)+1;
 
+    if (ret)
+    {
+        *peUse = SidTypeUser;
+    }
+
     FreeSid(pSid);
 
     return ret;
diff --git a/dlls/advapi32/tests/security.c b/dlls/advapi32/tests/security.c
index d1e5b5c6c3e..7ec03b28bdb 100644
--- a/dlls/advapi32/tests/security.c
+++ b/dlls/advapi32/tests/security.c
@@ -1556,8 +1556,8 @@ static void test_LookupAccountName(void)
         ok(!lstrcmp(domain, sid_dom), "Expected %s, got %s\n", sid_dom, domain);
         ok(domain_size == domain_save - 1, "Expected %d, got %d\n", domain_save - 1, domain_size);
         ok(lstrlen(domain) == domain_size, "Expected %d, got %d\n", lstrlen(domain), domain_size);
-        ok(sid_use == SidTypeUser, "Expected SidTypeUser (%d), got %d\n", SidTypeUser, sid_use);
     }
+    ok(sid_use == SidTypeUser, "Expected SidTypeUser (%d), got %d\n", SidTypeUser, sid_use);
     domain_size = domain_save;
     sid_size = sid_save;