diff --git a/stm/Makefile b/stm/Makefile
index 1e0831159e..c61900e3d1 100644
--- a/stm/Makefile
+++ b/stm/Makefile
@@ -33,6 +33,7 @@ SRC_C = \
 	audio.c \
 	sdio.c \
 	pybwlan.c \
+	i2c.c \
 
 SRC_S = \
 	startup_stm32f40xx.s \
diff --git a/stm/main.c b/stm/main.c
index f45e899854..22ce46f256 100644
--- a/stm/main.c
+++ b/stm/main.c
@@ -37,6 +37,7 @@
 #include "timer.h"
 #include "audio.h"
 #include "pybwlan.h"
+#include "i2c.h"
 
 int errno;
 
@@ -877,6 +878,7 @@ soft_reset:
         rt_store_attr(m, qstr_from_str_static("rand"), rt_make_function_0(pyb_rng_get));
         rt_store_attr(m, qstr_from_str_static("Led"), rt_make_function_1(pyb_Led));
         rt_store_attr(m, qstr_from_str_static("Servo"), rt_make_function_1(pyb_Servo));
+	rt_store_attr(m, qstr_from_str_static("I2C"), rt_make_function_2(pyb_I2C));
         rt_store_name(qstr_from_str_static("pyb"), m);
 
         rt_store_name(qstr_from_str_static("open"), rt_make_function_2(pyb_io_open));