diff --git a/include/polarssl/ssl.h b/include/polarssl/ssl.h
index 9bb0c44..24e60f7 100644
--- a/include/polarssl/ssl.h
+++ b/include/polarssl/ssl.h
@@ -247,6 +247,8 @@
 #define TLS_EXT_SERVERNAME                   0
 #define TLS_EXT_SERVERNAME_HOSTNAME          0
 
+#define TLS_EXT_MAX_FRAGMENT_LENGTH          1
+
 #define TLS_EXT_SUPPORTED_ELLIPTIC_CURVES   10
 #define TLS_EXT_SUPPORTED_POINT_FORMATS     11