diff --git a/include/fieldmap.h b/include/fieldmap.h
index a23b6c428..639e329a9 100644
--- a/include/fieldmap.h
+++ b/include/fieldmap.h
@@ -12,6 +12,8 @@
 #define MAX_MAP_DATA_SIZE 0x2800
 #define VIRTUAL_MAP_SIZE (MAX_MAP_DATA_SIZE)
 
+#define NUM_TILES_PER_METATILE 8
+
 // Map coordinates are offset by 7 when using the map
 // buffer because it needs to load sufficient border
 // metatiles to fill the player's view (the player has
diff --git a/src/field_camera.c b/src/field_camera.c
index e8d401907..88f94bff0 100644
--- a/src/field_camera.c
+++ b/src/field_camera.c
@@ -236,7 +236,7 @@ static void DrawMetatileAt(const struct MapLayout *mapLayout, u16 offset, int x,
         metatiles = mapLayout->secondaryTileset->metatiles;
         metatileId -= NUM_METATILES_IN_PRIMARY;
     }
-    DrawMetatile(MapGridGetMetatileLayerTypeAt(x, y), metatiles + metatileId * 8, offset);
+    DrawMetatile(MapGridGetMetatileLayerTypeAt(x, y), metatiles + metatileId * NUM_TILES_PER_METATILE, offset);
 }
 
 static void DrawMetatile(s32 metatileLayerType, const u16 *tiles, u16 offset)
diff --git a/src/shop.c b/src/shop.c
index 9f035a5ff..3d6b1cde4 100644
--- a/src/shop.c
+++ b/src/shop.c
@@ -740,9 +740,9 @@ static void BuyMenuDrawMapBg(void)
             metatileLayerType = MapGridGetMetatileLayerTypeAt(x + i, y + j);
 
             if (metatile < NUM_METATILES_IN_PRIMARY)
-                BuyMenuDrawMapMetatile(i, j, mapLayout->primaryTileset->metatiles + metatile * 8, metatileLayerType);
+                BuyMenuDrawMapMetatile(i, j, mapLayout->primaryTileset->metatiles + metatile * NUM_TILES_PER_METATILE, metatileLayerType);
             else
-                BuyMenuDrawMapMetatile(i, j, mapLayout->secondaryTileset->metatiles + ((metatile - NUM_METATILES_IN_PRIMARY) * 8), metatileLayerType);
+                BuyMenuDrawMapMetatile(i, j, mapLayout->secondaryTileset->metatiles + ((metatile - NUM_METATILES_IN_PRIMARY) * NUM_TILES_PER_METATILE), metatileLayerType);
         }
     }
 }