diff --git a/Mac/Include/pyconfig.h b/Mac/Include/pyconfig.h
index 11c5e6f..3f719d5 100644
--- a/Mac/Include/pyconfig.h
+++ b/Mac/Include/pyconfig.h
@@ -306,7 +306,7 @@
 #undef WITH_DYLD
 
 /* Define if you want to compile in Python-specific mallocs */
-#undef WITH_PYMALLOC
+#define WITH_PYMALLOC
 
 /* Define if you want to produce an OpenStep/Rhapsody framework
    (shared library plus accessory files). */