1 files changed, 7 insertions, 7 deletions

diff --git a/apps/plugins/chessbox/chessbox_pgn.h b/apps/plugins/chessbox/chessbox_pgn.h
index 672bacaf6e..a457619887 100644
--- a/apps/plugins/chessbox/chessbox_pgn.h
+++ b/apps/plugins/chessbox/chessbox_pgn.h
@@ -350,35 +350,35 @@ struct pgn_game_node {
  * the user selects a game, that obviously saves processing
  * and speeds up response when the user selects the file
  */
-struct pgn_game_node* pgn_list_games(struct plugin_api* api,
+struct pgn_game_node* pgn_list_games(const struct plugin_api* api,
                                      const char* filename);
 
 /* Show the list of games found in a file and allow the user
  * to select a game to be parsed and showed
  */
-struct pgn_game_node* pgn_show_game_list(struct plugin_api* api,
+struct pgn_game_node* pgn_show_game_list(const struct plugin_api* api,
                                          struct pgn_game_node* first_game);
 
 /* Parse the pgn string of a game and assign it to the move
  * list in the structure
  */
-void pgn_parse_game(struct plugin_api* api, const char* filename,
+void pgn_parse_game(const struct plugin_api* api, const char* filename,
                     struct pgn_game_node* selected_game);
 
 /* Initialize a new game structure with default values and make
  * it ready to store the history of a newly played match
  */
-struct pgn_game_node* pgn_init_game(struct plugin_api* api);
+struct pgn_game_node* pgn_init_game(const struct plugin_api* api);
 
 /* Add a new ply to the game structure based on the positions */
-void pgn_append_ply(struct plugin_api* api, struct pgn_game_node* game,
+void pgn_append_ply(const struct plugin_api* api, struct pgn_game_node* game,
                     unsigned short ply_player, char *move_buffer, bool is_mate);
 
 /* Set the result of the game if it was reached during the opponent's ply
  */
-void pgn_set_result(struct plugin_api* api, struct pgn_game_node* game,
+void pgn_set_result(const struct plugin_api* api, struct pgn_game_node* game,
                     bool is_mate);
 
 /* Store a complete game in the PGN history file
  */
-void pgn_store_game(struct plugin_api* api, struct pgn_game_node* game);
+void pgn_store_game(const struct plugin_api* api, struct pgn_game_node* game);