diff --git a/include/mbedtls/x509_crt.h b/include/mbedtls/x509_crt.h
index 3eee460..5212e67 100644
--- a/include/mbedtls/x509_crt.h
+++ b/include/mbedtls/x509_crt.h
@@ -235,8 +235,11 @@
 
     /* for find_parent_in() */
     mbedtls_x509_crt *parent; /* non-null iff parent_in in progress */
+
+#if defined(MBEDTLS_HAVE_TIME_DATE)
     mbedtls_x509_crt *fallback_parent;
     int fallback_signature_is_good;
+#endif /* MBEDTLS_HAVE_TIME_DATE */
 
     /* for find_parent() */
     int parent_is_trusted; /* -1 if find_parent is not in progress */