diff --git a/include/mbedtls/x509_crt.h b/include/mbedtls/x509_crt.h
index 6e07ac6..0c71dae 100644
--- a/include/mbedtls/x509_crt.h
+++ b/include/mbedtls/x509_crt.h
@@ -87,7 +87,8 @@
 
     unsigned int key_usage;     /**< Optional key usage extension value: See the values in x509.h */
 
-    mbedtls_x509_sequence ext_key_usage; /**< Optional list of extended key usage OIDs. */
+    mbedtls_x509_sequence ext_key_usage;    /**< Optional list of extended key usage OIDs. */
+    mbedtls_x509_buf_raw ext_key_usage_raw; /**< Raw data of ExtendedKeyUsage extensions.  */
 
     unsigned char ns_cert_type; /**< Optional Netscape certificate type extension value: See the values in x509.h */