diff --git a/src/economy.h b/src/economy.h
index ec12ae0ca..6d58a1f9f 100644
--- a/src/economy.h
+++ b/src/economy.h
@@ -45,6 +45,7 @@ extern "C" {
     struct faction;
     struct order;
     struct message;
+    struct item_type;
     
     typedef struct econ_request {
         struct econ_request *next;