1 files changed, 1 insertions, 1 deletions

diff --git a/shell/hush.c b/shell/hush.c
index 836f3b83c..c8356f4b8 100644
--- a/shell/hush.c
+++ b/shell/hush.c
@@ -5736,7 +5736,7 @@ static NOINLINE const char *expand_one_var(char **to_be_freed_pp, char *arg, cha
                                 if (len < 0) /* bash compat */
                                         die_if_script("%s: substring expression < 0", var);
                         }
-                        if (len == 0 || !val || beg >= strlen(val)) {
+                        if (len <= 0 || !val || beg >= strlen(val)) {
  arith_err:
                                 val = NULL;
                         } else {