diff --git a/resolv/tst-resolv-trailing.c b/resolv/tst-resolv-trailing.c
index c42e2a34d6..ce141759ad 100644
--- a/resolv/tst-resolv-trailing.c
+++ b/resolv/tst-resolv-trailing.c
@@ -114,7 +114,7 @@ do_test (void)
          AI_V4MAPPED,
          AI_V4MAPPED | AI_NUMERICHOST,
         };
-      for (size_t gai_flags_idx; gai_flags_idx < array_length (gai_flags);
+      for (size_t gai_flags_idx = 0; gai_flags_idx < array_length (gai_flags);
              ++gai_flags_idx)
         {
           struct addrinfo hints = { .ai_flags = gai_flags[gai_flags_idx], };