diff --git a/Source/Client/Mode/ModeLifetime.cpp b/Source/Client/Mode/ModeLifetime.cpp
index 5a969db7..1eae7e8c 100644
--- a/Source/Client/Mode/ModeLifetime.cpp
+++ b/Source/Client/Mode/ModeLifetime.cpp
@@ -10,6 +10,13 @@ int SetServiceFlags(int first, int second) {
   return serviceType;
 }
 
+// OFFSET: 0x00AD53B0
+// FUNCTION: fn_17821
+void* __fastcall sub_AD53B0(void* self) {
+  *reinterpret_cast<int*>(self) = 1;
+  return self;
+}
+
 // OFFSET: 0x00AD53C0
 // FUNCTION: fn_17822
 CMode::~CMode() {