diff --git a/nml/actions/action5.py b/nml/actions/action5.py
index 04059b782..4c16955d1 100644
--- a/nml/actions/action5.py
+++ b/nml/actions/action5.py
@@ -85,6 +85,7 @@ class Action5BlockType:
     "OTTD_RECOLOUR": (0x18, 1, Action5BlockType.OFFSET),
     "ROAD_WAYPOINTS": (0x19, 4, Action5BlockType.OFFSET),
     "OVERLAY_ROCKS": (0x1A, 95, Action5BlockType.OFFSET),
+    "BRIDGE_DECKS": (0x1B, 24, Action5BlockType.OFFSET),
 }