diff --git a/python/port/mod/turtle/modturtle.cpp b/python/port/mod/turtle/modturtle.cpp
index ed6b50599..992b90281 100644
--- a/python/port/mod/turtle/modturtle.cpp
+++ b/python/port/mod/turtle/modturtle.cpp
@@ -44,8 +44,16 @@ mp_obj_t modturtle_left(mp_obj_t angle) {
   return mp_const_none;
 }
 
-mp_obj_t modturtle_circle(mp_obj_t radius, mp_obj_t angle) {
-  sTurtle.circle(mp_obj_get_int(radius), mp_obj_get_float(angle));
+mp_obj_t modturtle_circle(size_t n_args, const mp_obj_t *args) {
+  mp_int_t radius = mp_obj_get_int(args[0]);
+
+  if (n_args == 1) {
+    sTurtle.circle(radius);
+  }
+  else {
+    mp_float_t angle = mp_obj_get_float(args[1]);
+    sTurtle.circle(radius, angle);
+  }
   return mp_const_none;
 }
 
diff --git a/python/port/mod/turtle/modturtle.h b/python/port/mod/turtle/modturtle.h
index b5f28bc01..93fe483b9 100644
--- a/python/port/mod/turtle/modturtle.h
+++ b/python/port/mod/turtle/modturtle.h
@@ -9,7 +9,7 @@ mp_obj_t modturtle_forward(mp_obj_t px);
 mp_obj_t modturtle_backward(mp_obj_t px);
 mp_obj_t modturtle_right(mp_obj_t deg);
 mp_obj_t modturtle_left(mp_obj_t deg);
-mp_obj_t modturtle_circle(mp_obj_t radius, mp_obj_t angle);
+mp_obj_t modturtle_circle(size_t n_args, const mp_obj_t *args);
 mp_obj_t modturtle_goto(size_t n_args, const mp_obj_t *args);
 mp_obj_t modturtle_setheading(mp_obj_t deg);
 mp_obj_t modturtle_speed(mp_obj_t speed);
diff --git a/python/port/mod/turtle/modturtle_table.c b/python/port/mod/turtle/modturtle_table.c
index 65c8fc2eb..6f6369a54 100644
--- a/python/port/mod/turtle/modturtle_table.c
+++ b/python/port/mod/turtle/modturtle_table.c
@@ -6,7 +6,7 @@ STATIC MP_DEFINE_CONST_FUN_OBJ_1(modturtle_forward_obj, modturtle_forward);
 STATIC MP_DEFINE_CONST_FUN_OBJ_1(modturtle_backward_obj, modturtle_backward);
 STATIC MP_DEFINE_CONST_FUN_OBJ_1(modturtle_right_obj, modturtle_right);
 STATIC MP_DEFINE_CONST_FUN_OBJ_1(modturtle_left_obj, modturtle_left);
-STATIC MP_DEFINE_CONST_FUN_OBJ_2(modturtle_circle_obj, modturtle_circle);
+STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(modturtle_circle_obj, 1, 2, modturtle_circle);
 STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(modturtle_goto_obj, 1, 2, modturtle_goto);
 STATIC MP_DEFINE_CONST_FUN_OBJ_1(modturtle_setheading_obj, modturtle_setheading);
 STATIC MP_DEFINE_CONST_FUN_OBJ_1(modturtle_speed_obj, modturtle_speed);
diff --git a/python/port/mod/turtle/turtle.h b/python/port/mod/turtle/turtle.h
index 5430594fc..0cf437d2a 100644
--- a/python/port/mod/turtle/turtle.h
+++ b/python/port/mod/turtle/turtle.h
@@ -44,7 +44,7 @@ public:
   void backward(mp_float_t length) { forward(-length); }
   void right(mp_float_t angle) { left(-angle); }
   void left(mp_float_t angle);
-  void circle(mp_int_t radius, mp_float_t angle);
+  void circle(mp_int_t radius, mp_float_t angle = 360);
   bool goTo(mp_float_t x, mp_float_t y);
 
   mp_float_t heading() const;