--- a/src/tls/x509v3.c
+++ b/src/tls/x509v3.c
@@ -1832,8 +1832,11 @@ int x509_certificate_chain_validate(stru
 		if (chain_trusted)
 			continue;
 
-		if ((unsigned long) now.sec <
+		if (
+#ifndef NO_TIMESTAMP_CHECK
+		    (unsigned long) now.sec <
 		    (unsigned long) cert->not_before ||
+#endif
 		    (unsigned long) now.sec >
 		    (unsigned long) cert->not_after) {
 			wpa_printf(MSG_INFO, "X509: Certificate not valid "
