diff --git a/micropython/modules/pimoroni_i2c/pimoroni_i2c.cpp b/micropython/modules/pimoroni_i2c/pimoroni_i2c.cpp
index 609e9acb..63f851ad 100644
--- a/micropython/modules/pimoroni_i2c/pimoroni_i2c.cpp
+++ b/micropython/modules/pimoroni_i2c/pimoroni_i2c.cpp
@@ -51,8 +51,8 @@ mp_obj_t PimoroniI2C_make_new(const mp_obj_type_t *type, size_t n_args, size_t n
 
     enum { ARG_sda, ARG_scl, ARG_baudrate };
     static const mp_arg_t allowed_args[] = {
-        { MP_QSTR_sda, MP_ARG_INT, {.u_int = I2C_DEFAULT_SDA} },
-        { MP_QSTR_scl, MP_ARG_INT, {.u_int = I2C_DEFAULT_SCL} },
+        { MP_QSTR_sda, MP_ARG_OBJ, {.u_obj = MP_ROM_INT(I2C_DEFAULT_SDA)} },
+        { MP_QSTR_scl, MP_ARG_OBJ, {.u_obj = MP_ROM_INT(I2C_DEFAULT_SCL)} },
         { MP_QSTR_baudrate, MP_ARG_INT, {.u_int = I2C_DEFAULT_BAUDRATE} },
     };
 
@@ -61,8 +61,8 @@ mp_obj_t PimoroniI2C_make_new(const mp_obj_type_t *type, size_t n_args, size_t n
     mp_arg_parse_all_kw_array(n_args, n_kw, all_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
 
     // Get I2C bus.
-    int sda = args[ARG_sda].u_int;
-    int scl = args[ARG_scl].u_int;
+    int sda = mp_hal_get_pin_obj(args[ARG_sda].u_obj);
+    int scl = mp_hal_get_pin_obj(args[ARG_scl].u_obj);
     int baud = args[ARG_baudrate].u_int;
     int i2c_id = (sda >> 1) & 0b1;  // i2c bus for given SDA pin