diff --git a/wadsrc/static/zscript/actors/actor.zs b/wadsrc/static/zscript/actors/actor.zs
index 96d60b7616..57ff2e5876 100644
--- a/wadsrc/static/zscript/actors/actor.zs
+++ b/wadsrc/static/zscript/actors/actor.zs
@@ -252,7 +252,7 @@ class Actor : Thinker native
 	native readonly int BloodTranslation;
 	native int RenderHidden;
 	native int RenderRequired;
-	native readonly int FriendlySeeBlocks;
+	native int FriendlySeeBlocks;
 	native readonly int SpawnTime;
 	private native int InventoryID;	// internal counter.