diff --git a/src/main/java/ch/hepia/ui/MainWindowController.java b/src/main/java/ch/hepia/ui/MainWindowController.java
index 318b7c19e6602407321246d3e5be656625d48908..7cd8f7533f16ae88ee4c1638c8d5806aeea384aa 100644
--- a/src/main/java/ch/hepia/ui/MainWindowController.java
+++ b/src/main/java/ch/hepia/ui/MainWindowController.java
@@ -256,6 +256,7 @@ public class MainWindowController implements Initializable {
 
     /**
      * Create a new journey and broadcast it
+     * Set the journey label and the current journey
      * @param app App context
      * @param pnl Panel containing the journey information
      */
@@ -283,17 +284,19 @@ public class MainWindowController implements Initializable {
                     if (command.length > 1) {
                         Main.getContext().getUser().get().addIgnoredUser(new User(command[1]));
                         drawMessage(command[1] + " bloqué.",
-                                "/img/help.png", c);
+                        AppConfig.HELP_MESSAGE_ICON, c);
                     }
                     break;
                 case "ignoredlist":
                     List<User> list = Main.getContext().getUser().get().getIgnoredUserList();
-                    StringBuilder buffer = new StringBuilder(list.get(0).getName());
-                    for (int i = 1; i < list.size(); i++){
-                        buffer.append(", ").append(list.get(i).getName());
+                    if (list.size() > 0) {
+                        StringBuilder buffer = new StringBuilder(list.get(0).getName());
+                        for (int i = 1; i < list.size(); i++){
+                            buffer.append(", ").append(list.get(i).getName());
+                        }
+                        drawMessage("Bloqués : " + buffer.toString(),
+                        AppConfig.HELP_MESSAGE_ICON, c);
                     }
-                    drawMessage("Bloqués : " + buffer.toString(),
-                            "/img/help.png", c);
                     break;
             }
         } else {