--- Modules/gcmodule.c.ori	2011-04-17 16:08:46.377101482 +0200
+++ Modules/gcmodule.c	2011-04-17 16:13:05.362085375 +0200
@@ -23,6 +23,7 @@
 
 */
 
+#include <malloc.h>
 #include "Python.h"
 #include "frameobject.h"        /* for PyFrame_ClearFreeList */
 
@@ -1035,6 +1036,8 @@
         collecting = 0;
     }
 
+    malloc_trim(0);
+
     return PyLong_FromSsize_t(n);
 }