diff --git a/shared-bindings/busio/I2C.c b/shared-bindings/busio/I2C.c
index e792d25757..e17a72b481 100644
--- a/shared-bindings/busio/I2C.c
+++ b/shared-bindings/busio/I2C.c
@@ -114,7 +114,7 @@ STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(busio_i2c___exit___obj, 4, 4, busio_i
 static void check_lock(busio_i2c_obj_t *self) {
     asm("");
     if (!common_hal_busio_i2c_has_lock(self)) {
-        mp_raise_RuntimeError(translate("Function requires lock."));
+        mp_raise_RuntimeError(translate("Function requires lock"));
     }
 }