diff --git a/src/signs_cmd.cpp b/src/signs_cmd.cpp
--- a/src/signs_cmd.cpp
+++ b/src/signs_cmd.cpp
@@ -132,5 +132,5 @@ void CcPlaceSign(const CommandCost &resu
  */
 void PlaceProc_Sign(TileIndex tile)
 {
-	DoCommandP(CMD_PLACE_SIGN, STR_ERROR_CAN_T_PLACE_SIGN_HERE, CcPlaceSign, tile, 0, 0);
+	Command<CMD_PLACE_SIGN>::Post(STR_ERROR_CAN_T_PLACE_SIGN_HERE, CcPlaceSign, tile, 0, 0, {});
 }