diff --git a/src/event/ngx_event_openssl.c b/src/event/ngx_event_openssl.c
index 77600298c..ab54d88c4 100644
--- a/src/event/ngx_event_openssl.c
+++ b/src/event/ngx_event_openssl.c
@@ -1857,6 +1857,9 @@ ngx_ssl_connection_error(ngx_connection_t *c, int sslerr, ngx_err_t err,
 #endif
 #ifdef SSL_R_SCSV_RECEIVED_WHEN_RENEGOTIATING
             || n == SSL_R_SCSV_RECEIVED_WHEN_RENEGOTIATING           /*  345 */
+#endif
+#ifdef SSL_R_INAPPROPRIATE_FALLBACK
+            || n == SSL_R_INAPPROPRIATE_FALLBACK                     /*  373 */
 #endif
             || n == 1000 /* SSL_R_SSLV3_ALERT_CLOSE_NOTIFY */
             || n == SSL_R_SSLV3_ALERT_UNEXPECTED_MESSAGE             /* 1010 */