diff --git a/include/constants/metatile_behaviors.h b/include/constants/metatile_behaviors.h
index 94cb0ffcaa..7fe10a7d20 100755
--- a/include/constants/metatile_behaviors.h
+++ b/include/constants/metatile_behaviors.h
@@ -236,10 +236,14 @@
 #define MB_WIRELESS_BOX_RESULTS 0xE8
 #define MB_TRAINER_HILL_TIMER 0xE9
 #define MB_SKY_PILLAR_CLOSED_DOOR 0xEA
-#define MB_UNUSED_EB 0xEB
-#define MB_UNUSED_EC 0xEC
-#define MB_UNUSED_ED 0xED
-#define MB_UNUSED_EE 0xEE
-#define MB_UNUSED_EF 0xEF
+
+//sideways stairs
+#define MB_SIDEWAYS_STAIRS_0    0xEB
+#define MB_SIDEWAYS_STAIRS_1    0xEC
+#define MB_SIDEWAYS_STAIRS_2    0xED
+#define MB_SIDEWAYS_STAIRS_3    0xEE
+#define MB_SIDEWAYS_STAIRS_4    0xEF
+#define MB_SIDEWAYS_STAIRS_5    0xF0
+
 
 #endif // GUARD_METATILE_BEHAVIORS