diff --git a/libc/netbsd/resolv/res_cache.c b/libc/netbsd/resolv/res_cache.c
index efce7dc..20f37e1 100644
--- a/libc/netbsd/resolv/res_cache.c
+++ b/libc/netbsd/resolv/res_cache.c
@@ -1860,8 +1860,10 @@
     for (i = 0; i <= MAXNS; i++) {
         free(cache_info->nameservers[i]);
         cache_info->nameservers[i] = NULL;
-        freeaddrinfo(cache_info->nsaddrinfo[i]);
-        cache_info->nsaddrinfo[i] = NULL;
+        if (cache_info->nsaddrinfo[i] != NULL) {
+            freeaddrinfo(cache_info->nsaddrinfo[i]);
+            cache_info->nsaddrinfo[i] = NULL;
+        }
     }
 }