diff --git a/src/ai/api/ai_industrylist.cpp b/src/ai/api/ai_industrylist.cpp
new file mode 100644
--- /dev/null
+++ b/src/ai/api/ai_industrylist.cpp
@@ -0,0 +1,42 @@
+/* $Id$ */
+
+/** @file ai_industrylist.cpp Implementation of AIIndustryList and friends. */
+
+#include "ai_industrylist.hpp"
+#include "../../openttd.h"
+#include "../../tile_type.h"
+#include "../../industry.h"
+
+AIIndustryList::AIIndustryList()
+{
+	Industry *i;
+	FOR_ALL_INDUSTRIES(i) {
+		this->AddItem(i->index);
+	}
+}
+
+AIIndustryList_CargoAccepting::AIIndustryList_CargoAccepting(CargoID cargo_id)
+{
+	const Industry *i;
+	const IndustrySpec *indsp;
+
+	FOR_ALL_INDUSTRIES(i) {
+		indsp = ::GetIndustrySpec(i->type);
+
+		for (byte j = 0; j < lengthof(indsp->accepts_cargo); j++)
+			if (indsp->accepts_cargo[j] == cargo_id) this->AddItem(i->index);
+	}
+}
+
+AIIndustryList_CargoProducing::AIIndustryList_CargoProducing(CargoID cargo_id)
+{
+	const Industry *i;
+	const IndustrySpec *indsp;
+
+	FOR_ALL_INDUSTRIES(i) {
+		indsp = ::GetIndustrySpec(i->type);
+
+		for (byte j = 0; j < lengthof(indsp->produced_cargo); j++)
+			if (indsp->produced_cargo[j] == cargo_id) this->AddItem(i->index);
+	}
+}