--- /dev/null
+--- a/src/tls/x509v3.c
++++ b/src/tls/x509v3.c
+@@ -1848,6 +1848,9 @@ int x509_certificate_chain_validate(stru
+ if (chain_trusted)
+ continue;
+
++#ifdef NO_TIMESTAMP_CHECK
++ disable_time_checks = 1;
++#endif
+ if (!disable_time_checks &&
+ ((unsigned long) now.sec <
+ (unsigned long) cert->not_before ||