diff --git a/src/supertux/menu/world_set_menu.cpp b/src/supertux/menu/world_set_menu.cpp
index 93d358062d5..0aa9472cad4 100644
--- a/src/supertux/menu/world_set_menu.cpp
+++ b/src/supertux/menu/world_set_menu.cpp
@@ -29,7 +29,7 @@ WorldSetMenu::WorldSetMenu()
 
   // Add Story Mode entry.
   // Story Mode should not have its progress shown.
-  add_world(_("Story Mode"), "levels/world1", { -1, -1 }, find_preview("previews/world1.png", "levels/world1"));
+  add_world(_("Story Mode"), "levels/world1", { 0, 0 }, find_preview("previews/world1.png", "levels/world1"));
 
   add_entry(1, _("Contrib Levels"));
   add_hl();
diff --git a/src/supertux/savegame.cpp b/src/supertux/savegame.cpp
index 2dd09d95c1e..0f324a8d090 100644
--- a/src/supertux/savegame.cpp
+++ b/src/supertux/savegame.cpp
@@ -98,10 +98,10 @@ LevelsetState::get_level_state(const std::string& filename) const
   }
 }
 
-int
+uint32_t
 Savegame::Progress::get_percentage() const
 {
-  return solved > 0 ? static_cast<int>(static_cast<float>(solved) / total * 100) : 0;
+  return solved > 0 ? static_cast<uint32_t>(static_cast<float>(solved) / static_cast<float>(total) * 100) : 0;
 }
 
 std::unique_ptr<Savegame>
diff --git a/src/supertux/savegame.hpp b/src/supertux/savegame.hpp
index 9e6533cc546..ddc208a940e 100644
--- a/src/supertux/savegame.hpp
+++ b/src/supertux/savegame.hpp
@@ -78,10 +78,10 @@ class Savegame final
       solved(solved_),
       total(total_)
     {}
-    int solved;
-    int total;
+    uint32_t solved;
+    uint32_t total;
 
-    int get_percentage() const;
+    uint32_t get_percentage() const;
   };
 
 public: