diff --git a/src/ai/api/ai_subsidylist.cpp b/src/ai/api/ai_subsidylist.cpp
new file mode 100644
--- /dev/null
+++ b/src/ai/api/ai_subsidylist.cpp
@@ -0,0 +1,14 @@
+/* $Id$ */
+
+/** @file ai_subsidylist.cpp Implementation of AISubsidyList. */
+
+#include "ai_subsidylist.hpp"
+#include "ai_subsidy.hpp"
+#include "../../economy_func.h"
+
+AISubsidyList::AISubsidyList()
+{
+	for (uint i = 0; i < lengthof(_subsidies); i++) {
+		if (AISubsidy::IsValidSubsidy(i)) this->AddItem(i);
+	}
+}