diff --git a/constants.asm b/constants.asm
index 0dcb3af06..4d24a94d3 100644
--- a/constants.asm
+++ b/constants.asm
@@ -2174,3 +2174,10 @@ TR_NITE    EQU 3
 ATK_GT_DEF EQU 1
 ATK_LT_DEF EQU 2
 ATK_EQ_DEF EQU 3
+
+
+; connection directions
+EAST EQU 1
+WEST EQU 2
+SOUTH EQU 4
+NORTH EQU 8