diff --git a/app/src/main/cpp/skyline/services/fssrv/IFileSystemProxy.cpp b/app/src/main/cpp/skyline/services/fssrv/IFileSystemProxy.cpp
index df89a337..ec793bfe 100644
--- a/app/src/main/cpp/skyline/services/fssrv/IFileSystemProxy.cpp
+++ b/app/src/main/cpp/skyline/services/fssrv/IFileSystemProxy.cpp
@@ -86,6 +86,10 @@ namespace skyline::service::fssrv {
         return {};
     }
 
+    Result IFileSystemProxy::OpenPatchDataStorageByCurrentProcess(type::KSession &session, ipc::IpcRequest &request, ipc::IpcResponse &response) {
+        return result::EntityNotFound;
+    }
+
     Result IFileSystemProxy::GetGlobalAccessLogMode(type::KSession &session, ipc::IpcRequest &request, ipc::IpcResponse &response) {
         response.Push<u32>(0);
         return {};
diff --git a/app/src/main/cpp/skyline/services/fssrv/IFileSystemProxy.h b/app/src/main/cpp/skyline/services/fssrv/IFileSystemProxy.h
index 8431ef18..ba40c4f2 100644
--- a/app/src/main/cpp/skyline/services/fssrv/IFileSystemProxy.h
+++ b/app/src/main/cpp/skyline/services/fssrv/IFileSystemProxy.h
@@ -99,6 +99,8 @@ namespace skyline::service::fssrv {
          */
         Result OpenDataStorageByDataId(type::KSession &session, ipc::IpcRequest &request, ipc::IpcResponse &response);
 
+        Result OpenPatchDataStorageByCurrentProcess(type::KSession &session, ipc::IpcRequest &request, ipc::IpcResponse &response);
+
         /**
           * @brief Returns the filesystem log access mode
           * @url https://switchbrew.org/wiki/Filesystem_services#GetGlobalAccessLogMode
@@ -112,6 +114,7 @@ namespace skyline::service::fssrv {
             SFUNC(0x35, IFileSystemProxy, OpenReadOnlySaveDataFileSystem),
             SFUNC(0xC8, IFileSystemProxy, OpenDataStorageByCurrentProcess),
             SFUNC(0xCA, IFileSystemProxy, OpenDataStorageByDataId),
+            SFUNC(0xCB, IFileSystemProxy, OpenPatchDataStorageByCurrentProcess),
             SFUNC(0x3ED, IFileSystemProxy, GetGlobalAccessLogMode)
         )
     };
diff --git a/app/src/main/cpp/skyline/services/fssrv/results.h b/app/src/main/cpp/skyline/services/fssrv/results.h
index d2e5d792..722d15f0 100644
--- a/app/src/main/cpp/skyline/services/fssrv/results.h
+++ b/app/src/main/cpp/skyline/services/fssrv/results.h
@@ -8,6 +8,7 @@
 namespace skyline::service::fssrv::result {
     constexpr Result PathDoesNotExist(2, 1);
     constexpr Result NoRomFsAvailable(2, 1001);
+    constexpr Result EntityNotFound(2, 1002);
     constexpr Result UnexpectedFailure(2, 5000);
     constexpr Result InvalidArgument(2, 6001);
     constexpr Result InvalidOffset(2, 6061);