diff --git a/DMCompiler/DMStandard/Types/Atoms/Movable.dm b/DMCompiler/DMStandard/Types/Atoms/Movable.dm
index ff0a4b589e..4284a39e35 100644
--- a/DMCompiler/DMStandard/Types/Atoms/Movable.dm
+++ b/DMCompiler/DMStandard/Types/Atoms/Movable.dm
@@ -1,6 +1,8 @@
 /atom/movable
 	var/screen_loc
-
+	
+	var/loc // Re-declared as atom.loc is a const, but movable.loc isnt.
+	
 	var/animate_movement = FORWARD_STEPS as opendream_unimplemented
 	var/list/locs = null as opendream_unimplemented
 	var/glide_size = 0
diff --git a/DMCompiler/DMStandard/Types/Atoms/_Atom.dm b/DMCompiler/DMStandard/Types/Atoms/_Atom.dm
index ca0ee2c72e..b410e559cd 100644
--- a/DMCompiler/DMStandard/Types/Atoms/_Atom.dm
+++ b/DMCompiler/DMStandard/Types/Atoms/_Atom.dm
@@ -14,7 +14,7 @@
 	var/tmp/list/vis_locs = null as opendream_unimplemented
 	var/list/vis_contents = null
 
-	var/tmp/atom/loc
+	var/tmp/atom/loc as opendream_compiletimereadonly
 	var/dir = SOUTH
 	var/tmp/x = 0
 	var/tmp/y = 0