diff --git a/lib/filterx/func-str.c b/lib/filterx/func-str.c
index 765cb235ba..8d61c4f3f7 100644
--- a/lib/filterx/func-str.c
+++ b/lib/filterx/func-str.c
@@ -73,7 +73,7 @@ _filterx_expr_affix_get_nth_needle(FilterXExprAffix *self, guint64 index, const
   if (filterx_object_is_type(self->_needle_obj, &FILTERX_TYPE_NAME(string)) &&
       !filterx_object_extract_string(self->_needle_obj, &self->needle_str.borrowed_str_value, &self->needle_str_len))
     goto error;
-  *needle_str = (const gchar *) self->needle_str.owned_str_value;
+  *needle_str = (const gchar *) self->needle_str.borrowed_str_value;
   *needle_str_len = (gssize) MIN(self->needle_str_len, G_MAXSSIZE);
   if(self->ignore_case)
     {