1 files changed, 1 insertions, 1 deletions
diff --git a/src/numeric.c b/src/numeric.c
index d09213235..e081cf80a 100644
--- a/src/numeric.c
+++ b/src/numeric.c
@@ -169,7 +169,7 @@ mrb_flo_to_str(mrb_state *mrb, mrb_value flo)
       e = TRUE;
       n = n / pow(10.0, exp);
       if (isinf(n)) {
-        if (s[0] == '-') {
+        if (s < c) {            /* s[0] == '-' */
           return mrb_str_new_lit(mrb, "-0.0");
         }
         else {