diff --git a/src/widgets/ai_widget.h b/src/widgets/ai_widget.h
--- a/src/widgets/ai_widget.h
+++ b/src/widgets/ai_widget.h
@@ -10,28 +10,8 @@
 #ifndef WIDGETS_AI_WIDGET_H
 #define WIDGETS_AI_WIDGET_H
 
-#include "../company_type.h"
 #include "../textfile_type.h"
 
-/** Widgets of the #AIListWindow class. */
-enum AIListWidgets {
-	WID_AIL_CAPTION,   ///< Caption of the window.
-	WID_AIL_LIST,      ///< The matrix with all available AIs.
-	WID_AIL_SCROLLBAR, ///< Scrollbar next to the AI list.
-	WID_AIL_INFO_BG,   ///< Panel to draw some AI information on.
-	WID_AIL_ACCEPT,    ///< Accept button.
-	WID_AIL_CANCEL,    ///< Cancel button.
-};
-
-/** Widgets of the #AISettingsWindow class. */
-enum AISettingsWidgets {
-	WID_AIS_CAPTION,    ///< Caption of the window.
-	WID_AIS_BACKGROUND, ///< Panel to draw the settings on.
-	WID_AIS_SCROLLBAR,  ///< Scrollbar to scroll through all settings.
-	WID_AIS_ACCEPT,     ///< Accept button.
-	WID_AIS_RESET,      ///< Reset button.
-};
-
 /** Widgets of the #AIConfigWindow class. */
 enum AIConfigWidgets {
 	WID_AIC_BACKGROUND,       ///< Window background.
@@ -49,22 +29,4 @@ enum AIConfigWidgets {
 	WID_AIC_CONTENT_DOWNLOAD = WID_AIC_TEXTFILE + TFT_END, ///< Download content button.
 };
 
-/** Widgets of the #AIDebugWindow class. */
-enum AIDebugWidgets {
-	WID_AID_VIEW,                 ///< The row of company buttons.
-	WID_AID_NAME_TEXT,            ///< Name of the current selected.
-	WID_AID_SETTINGS,             ///< Settings button.
-	WID_AID_SCRIPT_GAME,          ///< Game Script button.
-	WID_AID_RELOAD_TOGGLE,        ///< Reload button.
-	WID_AID_LOG_PANEL,            ///< Panel where the log is in.
-	WID_AID_SCROLLBAR,            ///< Scrollbar of the log panel.
-	WID_AID_COMPANY_BUTTON_START, ///< Buttons in the VIEW.
-	WID_AID_COMPANY_BUTTON_END = WID_AID_COMPANY_BUTTON_START + MAX_COMPANIES - 1, ///< Last possible button in the VIEW.
-	WID_AID_BREAK_STRING_WIDGETS, ///< The panel to handle the breaking on string.
-	WID_AID_BREAK_STR_ON_OFF_BTN, ///< Enable breaking on string.
-	WID_AID_BREAK_STR_EDIT_BOX,   ///< Edit box for the string to break on.
-	WID_AID_MATCH_CASE_BTN,       ///< Checkbox to use match caching or not.
-	WID_AID_CONTINUE_BTN,         ///< Continue button.
-};
-
 #endif /* WIDGETS_AI_WIDGET_H */