diff --git a/dll/win32/samsrv/setup.c b/dll/win32/samsrv/setup.c
index 43f224d248a..eb7d0c9c249 100644
--- a/dll/win32/samsrv/setup.c
+++ b/dll/win32/samsrv/setup.c
@@ -389,8 +389,7 @@ SampSetupCreateUserAccount(HANDLE hDomainKey,
     FixedUserData.LastLogon.QuadPart = 0;
     FixedUserData.LastLogoff.QuadPart = 0;
     FixedUserData.PasswordLastSet.QuadPart = 0;
-    FixedUserData.AccountExpires.LowPart = MAXULONG;
-    FixedUserData.AccountExpires.HighPart = MAXLONG;
+    FixedUserData.AccountExpires.QuadPart = MAXLONGLONG;
     FixedUserData.LastBadPasswordTime.QuadPart = 0;
     FixedUserData.UserId = ulRelativeId;
     FixedUserData.PrimaryGroupId = DOMAIN_GROUP_RID_USERS;