1 files changed, 1 insertions, 2 deletions
diff --git a/py/objfloat.c b/py/objfloat.c
index 2ea9947fe..4db1bb89e 100644
--- a/py/objfloat.c
+++ b/py/objfloat.c
@@ -161,8 +161,7 @@ STATIC mp_obj_t float_unary_op(mp_unary_op_t op, mp_obj_t o_in) {
         case MP_UNARY_OP_POSITIVE: return o_in;
         case MP_UNARY_OP_NEGATIVE: return mp_obj_new_float(-val);
         case MP_UNARY_OP_ABS: {
-            // TODO check for NaN etc
-            if (val < 0) {
+            if (signbit(val)) {
                 return mp_obj_new_float(-val);
             } else {
                 return o_in;