#define SWIG_name    "glcanvasc"
 
 #include "wxPython.h"
+
+#ifdef __WXMAC__  // avoid a bug in Carbon headers
+#define scalb scalbn
+#endif
+
 #ifdef __WXMSW__
 #include "myglcanvas.h"
 #else
         PyDict_SetItemString(d,"WX_GL_MIN_ACCUM_ALPHA", PyInt_FromLong((long) WX_GL_MIN_ACCUM_ALPHA));
 
 
-    wxClassInfo::CleanUpClasses();
-    wxClassInfo::InitializeClasses();
-
 {
    int i;
    for (i = 0; _swig_mapping[i].n1; i++)