How can SWIG process a typedef used in a macro definition?

i am using SWIG to build a python interface from C source code. I have a header file with a bunch of values defined. Some of those definitions use a type defined in another header file. I am including this header file (and %importing) it in my SWIG interface file. I still don't get these defined values in my generated interface.

Here is the C header "control_params.h", of which I want to generate an interface from:

#include "my_enums.h"

#define MOTOR_SIZE (10U)

#define CHARGER_RATE_PERCENT (PERCENT_5)

Here is the other header "my_enums.h" that has the type defintion of PERCENT_5:

/** Some helpers for percent values */
typedef enum percent
{
PERCENT_0 = 0,
PERCENT_5 = 5,
PERCENT_10 = 10
} ePercent;

Here is my SWIG interface "control_param_interface.i":

%module control_param_interface
%{
#include "my_enums.h"
#include "control_params.h"
%}

%import my_enums.h
%include control_params.h

The result is that MOTOR_SIZE gets successfully wrapped, but SWIG is unable to process CHARGER_RATE_PERCENT:

Relevant section from the generated control_param_interface.py:

MOTOR_SIZE = _control_param_interface.MOTOR_SIZE 

As you can see, code for CHARGER_RATE_PERCENT is missing :/