1 files changed, 3 insertions, 0 deletions

diff --git a/src/lib/libssl/ssl_lib.c b/src/lib/libssl/ssl_lib.c
index a3c9309488..7755476de3 100644
--- a/src/lib/libssl/ssl_lib.c
+++ b/src/lib/libssl/ssl_lib.c
@@ -1054,6 +1054,9 @@ long SSL_ctrl(SSL *s,int cmd,long larg,void *parg)
                 s->max_cert_list=larg;
                 return(l);
         case SSL_CTRL_SET_MTU:
+                if (larg < (long)dtls1_min_mtu())
+                        return 0;
+
                 if (SSL_version(s) == DTLS1_VERSION ||
                     SSL_version(s) == DTLS1_BAD_VER)
                         {