diff --git a/src/order_cmd.cpp b/src/order_cmd.cpp
index 7d59fbeaed..4a6b3ae3b1 100644
--- a/src/order_cmd.cpp
+++ b/src/order_cmd.cpp
@@ -1339,7 +1339,7 @@ CommandCost CmdMoveOrder(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32
  * @param flags operation to perform
  * @param p1 various bitstuffed elements
  * - p1 = (bit  0 - 19) - ID of the vehicle
- * - p1 = (bit 24 - 31) - the selected order (if any). If the last order is given,
+ * - p1 = (bit 20 - 27) - the selected order (if any). If the last order is given,
  *                        the order will be inserted before that one
  *                        the maximum vehicle order id is 254.
  * @param p2 various bitstuffed elements