diff --git a/src/gui/gui-bar-item.c b/src/gui/gui-bar-item.c
index 4611b9bc0..64ee4ec9e 100644
--- a/src/gui/gui-bar-item.c
+++ b/src/gui/gui-bar-item.c
@@ -1187,31 +1187,37 @@ gui_bar_item_default_buffer_nicklist (void *data, struct t_gui_bar_item *item,
                             strcat (buf, " ");
                         }
                     }
-                    if (strchr (ptr_nick->prefix_color, '.'))
+                    if (ptr_nick->prefix_color)
                     {
-                        config_file_search_with_string (ptr_nick->prefix_color,
-                                                        NULL, NULL, &ptr_option,
-                                                        NULL);
-                        if (ptr_option)
-                            strcat (buf, gui_color_get_custom (gui_color_get_name (CONFIG_COLOR(ptr_option))));
-                    }
-                    else
-                    {
-                        strcat (buf, gui_color_get_custom (ptr_nick->prefix_color));
+                        if (strchr (ptr_nick->prefix_color, '.'))
+                        {
+                            config_file_search_with_string (ptr_nick->prefix_color,
+                                                            NULL, NULL, &ptr_option,
+                                                            NULL);
+                            if (ptr_option)
+                                strcat (buf, gui_color_get_custom (gui_color_get_name (CONFIG_COLOR(ptr_option))));
+                        }
+                        else
+                        {
+                            strcat (buf, gui_color_get_custom (ptr_nick->prefix_color));
+                        }
                     }
                     if (ptr_nick->prefix)
                         strcat (buf, ptr_nick->prefix);
-                    if (strchr (ptr_nick->color, '.'))
+                    if (ptr_nick->color)
                     {
-                        config_file_search_with_string (ptr_nick->color,
-                                                        NULL, NULL, &ptr_option,
-                                                        NULL);
-                        if (ptr_option)
-                            strcat (buf, gui_color_get_custom (gui_color_get_name (CONFIG_COLOR(ptr_option))));
-                    }
-                    else
-                    {
-                        strcat (buf, gui_color_get_custom (ptr_nick->color));
+                        if (strchr (ptr_nick->color, '.'))
+                        {
+                            config_file_search_with_string (ptr_nick->color,
+                                                            NULL, NULL, &ptr_option,
+                                                            NULL);
+                            if (ptr_option)
+                                strcat (buf, gui_color_get_custom (gui_color_get_name (CONFIG_COLOR(ptr_option))));
+                        }
+                        else
+                        {
+                            strcat (buf, gui_color_get_custom (ptr_nick->color));
+                        }
                     }
                     strcat (buf, ptr_nick->name);
                 }
@@ -1221,17 +1227,20 @@ gui_bar_item_default_buffer_nicklist (void *data, struct t_gui_bar_item *item,
                     {
                         strcat (buf, " ");
                     }
-                    if (strchr (ptr_group->color, '.'))
+                    if (ptr_group->color)
                     {
-                        config_file_search_with_string (ptr_group->color,
-                                                        NULL, NULL, &ptr_option,
-                                                        NULL);
-                        if (ptr_option)
-                            strcat (buf, gui_color_get_custom (gui_color_get_name (CONFIG_COLOR(ptr_option))));
-                    }
-                    else
-                    {
-                        strcat (buf, gui_color_get_custom (ptr_group->color));
+                        if (strchr (ptr_group->color, '.'))
+                        {
+                            config_file_search_with_string (ptr_group->color,
+                                                            NULL, NULL, &ptr_option,
+                                                            NULL);
+                            if (ptr_option)
+                                strcat (buf, gui_color_get_custom (gui_color_get_name (CONFIG_COLOR(ptr_option))));
+                        }
+                        else
+                        {
+                            strcat (buf, gui_color_get_custom (ptr_group->color));
+                        }
                     }
                     strcat (buf, gui_nicklist_get_group_start (ptr_group->name));
                 }