diff --git a/src/ssl.c b/src/ssl.c
index 755fe567a..0a9d22573 100644
--- a/src/ssl.c
+++ b/src/ssl.c
@@ -19651,6 +19651,13 @@ const char* wolfSSL_alert_type_string_long(int alertID)
                 return illegal_parameter_str;
             }
 
+        case unknown_ca:
+            {
+                static const char unknown_ca_str[] =
+                    "unknown_ca";
+                return unknown_ca_str;
+            }
+
         case decode_error:
             {
                 static const char decode_error_str[] =
diff --git a/wolfssl/ssl.h b/wolfssl/ssl.h
index 75a4b9558..26eee6487 100644
--- a/wolfssl/ssl.h
+++ b/wolfssl/ssl.h
@@ -391,6 +391,7 @@ enum AlertDescription {
     certificate_expired             =  45,
     certificate_unknown             =  46,
     illegal_parameter               =  47,
+    unknown_ca                      =  48,
     decode_error                    =  50,
     decrypt_error                   =  51,
     #ifdef WOLFSSL_MYSQL_COMPATIBLE