1 files changed, 1 insertions, 1 deletions
diff --git a/py/obj.c b/py/obj.c
index 515a95b2e4..0dab5f2ac7 100644
--- a/py/obj.c
+++ b/py/obj.c
@@ -505,7 +505,7 @@ void mp_get_buffer_raise(mp_obj_t obj, mp_buffer_info_t *bufinfo, mp_uint_t flag
     }
 }
 
-mp_obj_t mp_generic_unary_op(mp_uint_t op, mp_obj_t o_in) {
+mp_obj_t mp_generic_unary_op(mp_unary_op_t op, mp_obj_t o_in) {
     switch (op) {
         case MP_UNARY_OP_HASH: return MP_OBJ_NEW_SMALL_INT((mp_uint_t)o_in);
         default: return MP_OBJ_NULL; // op not supported