diff --git a/src/core/notebook.cpp b/src/core/notebook.cpp
index 203ca22..d17f79e 100644
--- a/src/core/notebook.cpp
+++ b/src/core/notebook.cpp
@@ -133,6 +133,8 @@ Notebook::Notebook(const std::string &local_data_folder, const std::string &root
                    NotebookType type)
     : local_data_folder_(local_data_folder), root_folder_(root_folder), type_(type) {}
 
+Notebook::~Notebook() = default;
+
 void Notebook::EnsureId() {
   if (config_.id.empty()) {
     config_.id = GenerateUUID();
diff --git a/src/core/notebook.h b/src/core/notebook.h
index 12cbb1f..4e4d251 100644
--- a/src/core/notebook.h
+++ b/src/core/notebook.h
@@ -56,7 +56,7 @@ struct NotebookRecord {
 
 class Notebook {
  public:
-  virtual ~Notebook() = default;
+  virtual ~Notebook();
 
   const std::string &GetId() const { return config_.id; }
   const std::string &GetRootFolder() const { return root_folder_; }
diff --git a/src/platform/process_utils.cpp b/src/platform/process_utils.cpp
index a68223a..cbc7ac3 100644
--- a/src/platform/process_utils.cpp
+++ b/src/platform/process_utils.cpp
@@ -16,7 +16,6 @@ FILE *ProcessUtils::OpenPipe(const std::string &command, const char *mode) {
 #ifdef _WIN32
   return _popen(command.c_str(), mode);
 #else
-  (void)utf8_mode;
   return popen(command.c_str(), mode);
 #endif
 }