diff --git a/tetris/scenes.cpp b/tetris/scenes.cpp
index 0f4660a..7063bd4 100644
--- a/tetris/scenes.cpp
+++ b/tetris/scenes.cpp
@@ -462,7 +462,7 @@ void handleKeyDownMenu( SDL_Keycode key ) {
     case SDLK_DOWN:
         g_menu_options[g_menu_select]->unsetColor();
         g_menu_select++;
-        if ( g_menu_select >= g_menu_options.size() )
+        if ( static_cast<size_t>(g_menu_select) >= g_menu_options.size() )
             g_menu_select = 0;
         g_menu_options[g_menu_select]->setColor( colors["menu_item_background"] );
         break;
@@ -537,7 +537,7 @@ void handleKeyDownGameOver( SDL_Keycode key ) {
     case SDLK_DOWN:
         g_game_over_options[g_game_over_select]->unsetColor();
         g_game_over_select++;
-        if ( g_game_over_select >= g_game_over_options.size() )
+        if ( static_cast<size_t>(g_game_over_select) >= g_game_over_options.size() )
             g_game_over_select = 0;
         g_game_over_options[g_game_over_select]->setColor( colors["menu_item_background"] );
         break;
@@ -609,7 +609,7 @@ void handleKeyDownOptions( SDL_Keycode key ) {
     case SDLK_DOWN:
         g_options_options[g_options_select]->unsetColor();
         g_options_select++;
-        if ( g_options_select >= g_options_options.size() )
+        if ( static_cast<size_t>(g_options_select) >= g_options_options.size() )
             g_options_select = 0;
         g_options_options[g_options_select]->setColor( colors["menu_item_background"] );
         break;
@@ -626,7 +626,7 @@ void handleKeyDownOptions( SDL_Keycode key ) {
         switch( g_options_select ) {
         case OPTIONS_MENU_COLOR_SCHEME:
             selected_color_scheme++;
-            if(selected_color_scheme >= color_schemes_names.size())
+            if(static_cast<size_t>(selected_color_scheme) >= color_schemes_names.size())
                 selected_color_scheme = 0;
             std::dynamic_pointer_cast<SDLPP::TextRenderer>(g_options_options[OPTIONS_MENU_COLOR_SCHEME])->changeText("Color scheme: " + color_schemes_names[selected_color_scheme]);
             g_update_colors = true;