diff --git a/src/tunnelbridge_cmd.cpp b/src/tunnelbridge_cmd.cpp
--- a/src/tunnelbridge_cmd.cpp
+++ b/src/tunnelbridge_cmd.cpp
@@ -16,7 +16,7 @@
 #include "stdafx.h"
 #include "rail_map.h"
 #include "landscape.h"
-#include "unmovable_map.h"
+#include "unmovable.h"
 #include "viewport_func.h"
 #include "cmd_helper.h"
 #include "command_func.h"
@@ -395,9 +395,11 @@ CommandCost CmdBuildBridge(TileIndex end
 					if (z_start < GetBridgeHeight(tile)) goto not_valid_below;
 					break;
 
-				case MP_UNMOVABLE:
-					if (!IsOwnedLand(tile)) goto not_valid_below;
+				case MP_UNMOVABLE: {
+					const UnmovableSpec *spec = UnmovableSpec::GetByTile(tile);
+					if ((spec->flags & OBJECT_FLAG_ALLOW_UNDER_BRIDGE) == 0) goto not_valid_below;
 					break;
+				}
 
 				case MP_CLEAR:
 					break;