Rename default config file to mpconfig.h, and port's to mpconfigport.h.
mpconfig.h will automatically pull mpconfigport.h.
diff --git a/py/mpconfig.h b/py/mpconfig.h
new file mode 100644
index 0000000..17c5a77
--- /dev/null
+++ b/py/mpconfig.h
@@ -0,0 +1,13 @@
+// This file contains default configuration settings for MicroPython.
+// You can override any of these options using mpconfigport.h file located
+// in a directory of your port.
+
+#include <mpconfigport.h>
+
+// Any options not explicitly set in mpconfigport.h will get default
+// values below.
+
+// Whether to collect memory allocation stats
+#ifndef MICROPY_MEM_STATS
+#define MICROPY_MEM_STATS (1)
+#endif