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-rw-r--r--Src/Modules/zutil.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/Src/Modules/zutil.c b/Src/Modules/zutil.c
index 9b2721a09..ef99303d2 100644
--- a/Src/Modules/zutil.c
+++ b/Src/Modules/zutil.c
@@ -1662,15 +1662,15 @@ add_opt_val(Zoptdesc d, char *arg)
v->str = NULL;
if (d->arr)
d->arr->num += (arg ? 2 : 1);
- } else if (arg) {
+ } else if (arg || d->flags & ZOF_GNUL) {
/* 3 here is '-' + '=' + NUL */
- char *s = (char *) zhalloc(strlen(d->name) + strlen(arg) + 3);
+ char *s = (char *) zhalloc(strlen(d->name) + strlen(arg ? arg : "") + 3);
*s = '-';
strcpy(s + 1, d->name);
if (d->flags & ZOF_GNUL)
strcat(s, "=");
- strcat(s, arg);
+ strcat(s, arg ? arg : "");
v->str = s;
if (d->arr)
d->arr->num += 1;