diff --git a/src/menu.cpp b/src/menu.cpp
index cb23b774cc8..bc9f929d840 100644
--- a/src/menu.cpp
+++ b/src/menu.cpp
@@ -852,7 +852,6 @@ TITLE_RESULT show_title(display& screen)
 	for(;;) {
 		int mousex, mousey;
 		const int mouse_flags = SDL_GetMouseState(&mousex,&mousey);
-
 		const bool left_button = mouse_flags&SDL_BUTTON_LMASK;
 
 		if(tutorial_button.process(mousex,mousey,left_button))
diff --git a/src/playlevel.cpp b/src/playlevel.cpp
index 2d7b5303a29..5e3c4940997 100644
--- a/src/playlevel.cpp
+++ b/src/playlevel.cpp
@@ -110,16 +110,15 @@ LEVEL_RESULT play_level(game_data& gameinfo, config& terrain_config,
 		                (*overlay)->values["image"]);
 	}
 
-	const double scroll_speed = 30.0;
-	const double zoom_amount = 5.0;
+	//UNUSED: const double scroll_speed = 30.0;
+	//UNUSED: const double zoom_amount = 5.0;
 
 	for(units_map::iterator i = units.begin(); i != units.end(); ++i) {
 		i->second.new_turn();
 	}
 
-	bool left_button = false, right_button = false;
-
-	gamemap::location selected_hex;
+	//UNUSED: bool left_button = false, right_button = false;
+	//UNUSED: gamemap::location selected_hex;
 
 	gui.scroll_to_tile(map.starting_position(1).x,map.starting_position(1).y,
 	                   display::WARP);
diff --git a/src/playturn.cpp b/src/playturn.cpp
index eaa5cabb0f0..f2ac85dc4b3 100644
--- a/src/playturn.cpp
+++ b/src/playturn.cpp
@@ -46,7 +46,7 @@ void play_turn(game_data& gameinfo, game_state& state_of_game,
 	team& current_team = teams[team_num-1];
 
 	const double scroll_speed = 30.0;
-	const double zoom_amount = 5.0;
+	//UNUSED: const double zoom_amount = 5.0;
 
 	const std::string menu_items[] = {"scenario_objectives","recruit",
 	                                  "recall","unit_list","save_game",
@@ -129,12 +129,11 @@ void play_turn(game_data& gameinfo, game_state& state_of_game,
 			   hex != selected_hex &&
 			   enemy->second.side() != u->second.side()) {
 
-				const unit_type& type = u->second.type();
-				const unit_type& enemy_type = enemy->second.type();
+				//UNUSED: const unit_type& type = u->second.type();
+				//UNUSED: const unit_type& enemy_type = enemy->second.type();
 				const std::vector<attack_type>& attacks = u->second.attacks();
 				std::vector<std::string> items;
-				const std::vector<attack_type>& defends =
-				                         enemy->second.attacks();
+				//UNUSED: const std::vector<attack_type>& defends = enemy->second.attacks();
 
 				std::vector<unit> units_list;
 
diff --git a/src/preferences.cpp b/src/preferences.cpp
index 215261eb721..c57499fe83e 100644
--- a/src/preferences.cpp
+++ b/src/preferences.cpp
@@ -202,7 +202,7 @@ void set_grid(bool ison)
 
 void show_preferences_dialog(display& disp)
 {
-	const int border_size = 6;
+	//UNUSED: const int border_size = 6;
 	const int xpos = disp.x()/2 - 300;
 	const int ypos = disp.y()/2 - 200;
 	const int width = 600;
@@ -286,7 +286,7 @@ void show_preferences_dialog(display& disp)
 		const int mouse_flags = SDL_GetMouseState(&mousex,&mousey);
 
 		const bool left_button = mouse_flags&SDL_BUTTON_LMASK;
-		const bool right_button = mouse_flags&SDL_BUTTON_RMASK;
+		//UNUSED: const bool right_button = mouse_flags&SDL_BUTTON_RMASK;
 
 		if(close_button.process(mousex,mousey,left_button)) {
 			break;