diff --git a/ports/stm32/mpconfigport.h b/ports/stm32/mpconfigport.h
index 00ded86e16..e5bcf4d701 100644
--- a/ports/stm32/mpconfigport.h
+++ b/ports/stm32/mpconfigport.h
@@ -117,7 +117,7 @@
 #endif
 #define MICROPY_PY_MACHINE_PULSE    (1)
 #define MICROPY_PY_MACHINE_PIN_MAKE_NEW mp_pin_make_new
-#define MICROPY_PY_MACHINE_I2C      (1)
+#define MICROPY_PY_MACHINE_I2C      (MICROPY_HW_ENABLE_HW_I2C)
 #define MICROPY_PY_MACHINE_SOFTI2C  (1)
 #define MICROPY_PY_MACHINE_I2S_INCLUDEFILE "ports/stm32/machine_i2s.c"
 #define MICROPY_PY_MACHINE_I2S_CONSTANT_RX (I2S_MODE_MASTER_RX)