diff --git a/code/__HELPERS/unsorted.dm b/code/__HELPERS/unsorted.dm
index 42a3b95a687..44e7a65e7d0 100644
--- a/code/__HELPERS/unsorted.dm
+++ b/code/__HELPERS/unsorted.dm
@@ -227,8 +227,10 @@ Turf and target are seperate in case you want to teleport some distance from a t
 			return 1
 	return 0
 
+#if DM_VERSION < 516
 /proc/sign(x)
 	return x!=0?x/abs(x):0
+#endif
 
 /proc/getline(atom/M,atom/N)//Ultra-Fast Bresenham Line-Drawing Algorithm
 	var/px=M.x		//starting x