diff --git a/examples/cc26xx/cc26xx-web-demo/project-conf.h b/examples/cc26xx/cc26xx-web-demo/project-conf.h
index d49a7b3e9..b7baac119 100644
--- a/examples/cc26xx/cc26xx-web-demo/project-conf.h
+++ b/examples/cc26xx/cc26xx-web-demo/project-conf.h
@@ -44,10 +44,14 @@
 #define CC26XX_WEB_DEMO_CONF_COAP_SERVER      1
 #define CC26XX_WEB_DEMO_CONF_NET_UART         1
 /*---------------------------------------------------------------------------*/
-/* Shrink the size of the uIP buffer, routing table and ND cache */
+/*
+ * Shrink the size of the uIP buffer, routing table and ND cache.
+ * Set the TCP MSS
+ */
 #define UIP_CONF_BUFFER_SIZE                900
 #define NBR_TABLE_CONF_MAX_NEIGHBORS          8
 #define UIP_CONF_MAX_ROUTES                   8
+#define UIP_CONF_TCP_MSS                    128
 /*---------------------------------------------------------------------------*/
 #endif /* PROJECT_CONF_H_ */
 /*---------------------------------------------------------------------------*/
diff --git a/platform/srf06-cc26xx/contiki-conf.h b/platform/srf06-cc26xx/contiki-conf.h
index d87e37954..d5c1aa402 100644
--- a/platform/srf06-cc26xx/contiki-conf.h
+++ b/platform/srf06-cc26xx/contiki-conf.h
@@ -220,7 +220,7 @@
 #define UIP_CONF_TCP                         1
 #endif
 #ifndef UIP_CONF_TCP_MSS
-#define UIP_CONF_TCP_MSS                   128
+#define UIP_CONF_TCP_MSS                    64
 #endif
 
 #define UIP_CONF_UDP                         1