diff --git a/library/ssl_misc.h b/library/ssl_misc.h
index 2d51333..9912d6c 100644
--- a/library/ssl_misc.h
+++ b/library/ssl_misc.h
@@ -512,7 +512,7 @@
 #if defined(MBEDTLS_SSL_SRV_C)
     /* Flag indicating if a CertificateRequest message has been sent
      * to the client or not. */
-    uint16_t certificate_request_sent;
+    uint8_t certificate_request_sent;
 #endif /* MBEDTLS_SSL_SRV_C */
 
 #if defined(MBEDTLS_SSL_SESSION_TICKETS)