diff --git a/src/app/commands/cmd_import_sprite_sheet.cpp b/src/app/commands/cmd_import_sprite_sheet.cpp
index e0c4ec4f4..a97d89ffa 100644
--- a/src/app/commands/cmd_import_sprite_sheet.cpp
+++ b/src/app/commands/cmd_import_sprite_sheet.cpp
@@ -124,8 +124,7 @@ protected:
     Command* openFile = Commands::instance()->byId(CommandId::OpenFile());
     Params params;
     params.set("filename", "");
-    openFile->loadParams(params);
-    openFile->execute(m_context);
+    m_context->executeCommand(openFile, params);
 
     // The user have selected another document.
     if (oldActiveDocument != m_context->activeDocument()) {
diff --git a/src/app/commands/command.h b/src/app/commands/command.h
index 6a4ae9291..a7569b181 100644
--- a/src/app/commands/command.h
+++ b/src/app/commands/command.h
@@ -1,5 +1,5 @@
 // Aseprite
-// Copyright (C) 2001-2017  David Capello
+// Copyright (C) 2001-2018  David Capello
 //
 // This program is distributed under the terms of
 // the End-User License Agreement for Aseprite.
@@ -36,7 +36,6 @@ namespace app {
     void loadParams(const Params& params);
     bool isEnabled(Context* context);
     bool isChecked(Context* context);
-    void execute(Context* context);
 
   protected:
     virtual bool onNeedsParams() const;
@@ -51,6 +50,9 @@ namespace app {
     }
 
   private:
+    friend class Context;
+    void execute(Context* context);
+
     std::string m_id;
     std::string m_friendlyName;
     CommandFlags m_flags;