diff --git a/test/tools_lpc_unittest.cpp b/test/tools_lpc_unittest.cpp
index 5b7ddb1..906d2b4 100644
--- a/test/tools_lpc_unittest.cpp
+++ b/test/tools_lpc_unittest.cpp
@@ -13,9 +13,10 @@
 
 TEST(LpcHandleTest, verifySendsFileContents)
 {
+    internal::InternalSysMock sysMock;
     BlobInterfaceMock blobMock;
 
-    LpcDataHandler handler(&blobMock);
+    LpcDataHandler handler(&blobMock, &sysMock);
     std::uint16_t session = 0xbeef;
     std::string filePath = "/asdf";
 
diff --git a/tools/lpc.hpp b/tools/lpc.hpp
index 48ffe7f..3363c01 100644
--- a/tools/lpc.hpp
+++ b/tools/lpc.hpp
@@ -2,6 +2,7 @@
 
 #include "blob_interface.hpp"
 #include "interface.hpp"
+#include "internal/sys.hpp"
 
 #include <cstdint>
 
@@ -19,7 +20,10 @@
 class LpcDataHandler : public DataInterface
 {
   public:
-    explicit LpcDataHandler(BlobInterface* blob) : blob(blob){};
+    LpcDataHandler(BlobInterface* blob,
+                   const internal::Sys* sys = &internal::sys_impl) :
+        blob(blob),
+        sys(sys){};
 
     bool sendContents(const std::string& input, std::uint16_t session) override;
     blobs::FirmwareBlobHandler::UpdateFlags supportedType() const override
@@ -29,6 +33,7 @@
 
   private:
     BlobInterface* blob;
+    const internal::Sys* sys;
 };
 
 } // namespace host_tool