diff --git a/tests/longlong/longlongtest.cpp b/tests/longlong/longlongtest.cpp
index fdeb5fdd71..e09edae668 100644
--- a/tests/longlong/longlongtest.cpp
+++ b/tests/longlong/longlongtest.cpp
@@ -305,7 +305,7 @@ void LongLongTestCase::ToString()
     a.Negate();
     CPPUNIT_ASSERT( a.ToString() == _T("-1311768467139281697") );
 
-    wxLongLong llMin(LONG_MIN, 0);
+    wxLongLong llMin(-2147483647L - 1L, 0);
     CPPUNIT_ASSERT( llMin.ToString() == _T("-9223372036854775808") );
 
 #if wxUSE_LONGLONG_WX