diff --git a/agent/sim/core.cc b/agent/sim/core.cc
index 8537eeb..c024e4f 100644
--- a/agent/sim/core.cc
+++ b/agent/sim/core.cc
@@ -81,7 +81,7 @@
 }
 
 Status ActivateOnu_(uint32_t intf_id, uint32_t onu_id,
-    const char *vendor_id, const char *vendor_specific, uint32_t pir) {
+    const char *vendor_id, const char *vendor_specific, uint32_t pir, bool omcc_encryption_mode) {
     return Status::OK;
 }