diff --git a/code/__DEFINES/misc.dm b/code/__DEFINES/misc.dm
index 90874a60bf..2ec21c83b3 100644
--- a/code/__DEFINES/misc.dm
+++ b/code/__DEFINES/misc.dm
@@ -9,8 +9,6 @@
 #define TEXT_EAST			"[EAST]"
 #define TEXT_WEST			"[WEST]"
 
-/// Inverse direction, taking into account UP|DOWN if necessary.
-#define REVERSE_DIR(dir) ( ((dir & 85) << 1) | ((dir & 170) >> 1) )
 /// world.icon_size
 #define PIXELS 32