diff --git a/src/core/hle/service/am/service/self_controller.cpp b/src/core/hle/service/am/service/self_controller.cpp
index 70ce7443c4..3a654b9daa 100644
--- a/src/core/hle/service/am/service/self_controller.cpp
+++ b/src/core/hle/service/am/service/self_controller.cpp
@@ -71,6 +71,7 @@ ISelfController::ISelfController(Core::System& system_, std::shared_ptr<Applet>
         {120, D<&ISelfController::SaveCurrentScreenshot>, "SaveCurrentScreenshot"},
         {130, D<&ISelfController::SetRecordVolumeMuted>, "SetRecordVolumeMuted"},
         {230, D<&ISelfController::Unknown230>, "Unknown230"},
+        {240, D<&ISelfController::Unknown240>, "Unknown240"},
         {1000, nullptr, "GetDebugStorageChannel"},
     };
     // clang-format on
@@ -422,4 +423,10 @@ Result ISelfController::Unknown230(u32 in_val, Out<u16> out_val) {
     R_SUCCEED();
 }
 
+Result ISelfController::Unknown240(u32 in_val) {
+    LOG_WARNING(Service_AM, "(STUBBED) called, in_val={}", in_val);
+
+    R_SUCCEED();
+}
+
 } // namespace Service::AM
diff --git a/src/core/hle/service/am/service/self_controller.h b/src/core/hle/service/am/service/self_controller.h
index b6403abde2..c9f480f575 100644
--- a/src/core/hle/service/am/service/self_controller.h
+++ b/src/core/hle/service/am/service/self_controller.h
@@ -68,6 +68,7 @@ private:
     Result SaveCurrentScreenshot(Capture::AlbumReportOption album_report_option);
     Result SetRecordVolumeMuted(bool muted);
     Result Unknown230(u32 in_val, Out<u16> out_val);
+    Result Unknown240(u32 in_val);
 
     Kernel::KProcess* const m_process;
     const std::shared_ptr<Applet> m_applet;