2 files changed, 5 insertions, 2 deletions
diff --git a/src/ai/ai.cpp b/src/ai/ai.cpp
index 07b31f77d..c6158b0c4 100644
--- a/src/ai/ai.cpp
+++ b/src/ai/ai.cpp
@@ -11,6 +11,9 @@
 #include "ai.h"
 #include "default/default.h"
 
+AIStruct _ai;
+AIPlayer _ai_player[MAX_PLAYERS];
+
 /**
  * Dequeues commands put in the queue via AI_PutCommandInQueue.
  */
diff --git a/src/ai/ai.h b/src/ai/ai.h
index 7ecc97571..44c6fe78c 100644
--- a/src/ai/ai.h
+++ b/src/ai/ai.h
@@ -36,8 +36,8 @@ struct AIStruct {
 	uint tick;              ///< The current tick (something like _frame_counter, only for AIs)
 };
 
-VARDEF AIStruct _ai;
-VARDEF AIPlayer _ai_player[MAX_PLAYERS];
+extern AIStruct _ai;
+extern AIPlayer _ai_player[MAX_PLAYERS];
 
 // ai.c
 void AI_StartNewAI(PlayerID player);