diff --git a/src/ai/api/ai_industrytypelist.cpp b/src/ai/api/ai_industrytypelist.cpp
new file mode 100644
--- /dev/null
+++ b/src/ai/api/ai_industrytypelist.cpp
@@ -0,0 +1,15 @@
+/* $Id$ */
+
+/** @file ai_industrytypelist.cpp Implementation of AIIndustryTypeList. */
+
+#include "ai_industrytypelist.hpp"
+#include "../../openttd.h"
+#include "../../tile_type.h"
+#include "../../industry.h"
+
+AIIndustryTypeList::AIIndustryTypeList()
+{
+	for (int i = 0; i < NUM_INDUSTRYTYPES; i++) {
+		if (AIIndustryType::IsValidIndustryType(i)) this->AddItem(i);
+	}
+}