diff --git a/apps/bttester/syscfg.yml b/apps/bttester/syscfg.yml
index 02acbc9df..d429db591 100644
--- a/apps/bttester/syscfg.yml
+++ b/apps/bttester/syscfg.yml
@@ -103,6 +103,7 @@ syscfg.vals:
     BLE_MESH_TESTING: 1
     BLE_MESH_FRIEND: 1
     BLE_MESH_CFG_CLI: 1
+    BLE_MESH_RX_SDU_MAX: 110
 
     BLE_MESH_ADV_BUF_COUNT: 20
     BLE_MESH_TX_SEG_MAX: 6