diff --git a/src/or/config.c b/src/or/config.c
index 60e55c9195..9e0ab4c2f8 100644
--- a/src/or/config.c
+++ b/src/or/config.c
@@ -2016,6 +2016,8 @@ config_lines_eq(config_line_t *a, config_line_t *b)
   while (a && b) {
     if (strcasecmp(a->key, b->key) || strcmp(a->value, b->value))
       return 0;
+    a = a->next;
+    b = b->next;
   }
   if (a || b)
     return 0;