diff --git a/src/ai/api/ai_townlist.cpp b/src/ai/api/ai_townlist.cpp
new file mode 100644
--- /dev/null
+++ b/src/ai/api/ai_townlist.cpp
@@ -0,0 +1,15 @@
+/* $Id$ */
+
+/** @file ai_townlist.cpp Implementation of AITownList and friends. */
+
+#include "ai_townlist.hpp"
+#include "../../openttd.h"
+#include "../../town.h"
+
+AITownList::AITownList()
+{
+	Town *t;
+	FOR_ALL_TOWNS(t) {
+		this->AddItem(t->index);
+	}
+}