1 files changed, 2 insertions, 8 deletions
diff --git a/src/ai/api/ai_bridge.cpp b/src/ai/api/ai_bridge.cpp
index f342404cf..03c457d4c 100644
--- a/src/ai/api/ai_bridge.cpp
+++ b/src/ai/api/ai_bridge.cpp
@@ -10,10 +10,11 @@
 #include "../../core/alloc_func.hpp"
 #include "../../economy_func.h"
 #include "../../settings_type.h"
+#include "../../date_func.h"
 
 /* static */ bool AIBridge::IsValidBridge(BridgeID bridge_id)
 {
-	return bridge_id < MAX_BRIDGES;
+	return bridge_id < MAX_BRIDGES && ::GetBridgeSpec(bridge_id)->avail_year <= _cur_year;
 }
 
 /* static */ bool AIBridge::IsBridgeTile(TileIndex tile)
@@ -159,13 +160,6 @@ static void _DoCommandReturnBuildBridge1(class AIInstance *instance)
 	return ::GetBridgeSpec(bridge_id)->min_length + 2;
 }
 
-/* static */ int32 AIBridge::GetYearAvailable(BridgeID bridge_id)
-{
-	if (!IsValidBridge(bridge_id)) return -1;
-
-	return ::GetBridgeSpec(bridge_id)->avail_year;
-}
-
 /* static */ TileIndex AIBridge::GetOtherBridgeEnd(TileIndex tile)
 {
 	if (!::IsValidTile(tile)) return INVALID_TILE;