diff --git a/tests/streams/bstream.h b/tests/streams/bstream.h
index 7304133977..677436b459 100644
--- a/tests/streams/bstream.h
+++ b/tests/streams/bstream.h
@@ -28,12 +28,6 @@
     CPPUNIT_TEST_SUITE_NAMED_REGISTRATION( Name, COMPOSE_TEST_NAME(Name) ); \
     STREAM_IMPLEMENT_SUB_REGISTRATION_ROUTINE( Name )
 
-// under 64 bit platforms wxFileOffset is the same as long and we already have
-// WX_CPPUNIT_ALLOW_EQUALS_TO_INT(long) in wx/cppunit.h
-#if SIZEOF_LONG != 8
-WX_CPPUNIT_ALLOW_EQUALS_TO_INT(wxFileOffset)
-#endif
-
 ///////////////////////////////////////////////////////////////////////////////
 // Template class that implements a test for all base stream functions.
 //