diff --git a/src/ai/api/ai_object.cpp b/src/ai/api/ai_object.cpp
--- a/src/ai/api/ai_object.cpp
+++ b/src/ai/api/ai_object.cpp
@@ -198,7 +198,7 @@ int AIObject::GetCallbackVariable(int in
 bool AIObject::DoCommand(TileIndex tile, uint32 p1, uint32 p2, uint cmd, const char *text, AISuspendCallbackProc *callback)
 {
 	if (AIObject::GetAllowDoCommand() == false) {
-		AILog::Error("You are not allowed to execute any DoCommand (even indirect) in your constructor, Save(), and Load().\n");
+		AILog::Error("You are not allowed to execute any DoCommand (even indirect) in your constructor, Save(), Load(), and any valuator.\n");
 		return false;
 	}