diff --git a/data/tilesets/pair_collision_tile_ids.asm b/data/tilesets/pair_collision_tile_ids.asm
new file mode 100644
index 00000000..84869556
--- /dev/null
+++ b/data/tilesets/pair_collision_tile_ids.asm
@@ -0,0 +1,24 @@
+; FORMAT: tileset number, tile 1, tile 2
+; terminated by -1
+; these entries indicate that the player may not cross between tile 1 and tile 2
+; it's mainly used to simulate differences in elevation
+
+TilePairCollisionsLand::
+	db CAVERN, $20, $05
+	db CAVERN, $41, $05
+	db FOREST, $30, $2E
+	db CAVERN, $2A, $05
+	db CAVERN, $05, $21
+	db FOREST, $52, $2E
+	db FOREST, $55, $2E
+	db FOREST, $56, $2E
+	db FOREST, $20, $2E
+	db FOREST, $5E, $2E
+	db FOREST, $5F, $2E
+	db -1 ; end
+
+TilePairCollisionsWater::
+	db FOREST, $14, $2E
+	db FOREST, $48, $2E
+	db CAVERN, $14, $05
+	db -1 ; end
diff --git a/home/overworld.asm b/home/overworld.asm
index 741b8b7e..9d5e42ef 100644
--- a/home/overworld.asm
+++ b/home/overworld.asm
@@ -1345,30 +1345,7 @@ CheckForTilePairCollisions::
 	and a
 	ret
 
-; FORMAT: tileset number, tile 1, tile 2
-; terminated by 0xFF
-; these entries indicate that the player may not cross between tile 1 and tile 2
-; it's mainly used to simulate differences in elevation
-
-TilePairCollisionsLand::
-	db CAVERN, $20, $05
-	db CAVERN, $41, $05
-	db FOREST, $30, $2E
-	db CAVERN, $2A, $05
-	db CAVERN, $05, $21
-	db FOREST, $52, $2E
-	db FOREST, $55, $2E
-	db FOREST, $56, $2E
-	db FOREST, $20, $2E
-	db FOREST, $5E, $2E
-	db FOREST, $5F, $2E
-	db $FF
-
-TilePairCollisionsWater::
-	db FOREST, $14, $2E
-	db FOREST, $48, $2E
-	db CAVERN, $14, $05
-	db $FF
+INCLUDE "data/tilesets/pair_collision_tile_ids.asm"
 
 ; this builds a tile map from the tile block map based on the current X/Y coordinates of the player's character
 LoadCurrentMapView::