diff --git a/ssl/t1_lib.c b/ssl/t1_lib.c
index 5e790a4..bb345b4 100644
--- a/ssl/t1_lib.c
+++ b/ssl/t1_lib.c
@@ -2193,7 +2193,8 @@
 
 static int ext_supported_groups_parse_serverhello(SSL *ssl, uint8_t *out_alert,
                                                   CBS *contents) {
-  /* This extension is not expected to be echoed by servers and is ignored. */
+  /* This extension is not expected to be echoed by servers in TLS 1.2, but some
+   * BigIP servers send it nonetheless, so do not enforce this. */
   return 1;
 }