diff --git a/src/or/routerparse.c b/src/or/routerparse.c
index 7d9769b49..2ee0d2720 100644
--- a/src/or/routerparse.c
+++ b/src/or/routerparse.c
@@ -5551,7 +5551,7 @@ tor_version_parse_platform(const char *platform,
   if (strict) {
     if (router_version->major < 0 ||
         router_version->minor < 0 ||
-        router_version->minor < 0 ||
+        router_version->micro < 0 ||
         router_version->patchlevel < 0 ||
         router_version->svn_revision < 0) {
       return -1;