2 files changed, 3 insertions, 1 deletions
diff --git a/include/fieldmap.h b/include/fieldmap.h
index fe2b5a928..e6a1e944a 100644
--- a/include/fieldmap.h
+++ b/include/fieldmap.h
@@ -15,7 +15,7 @@ u32 MapGridGetMetatileBehaviorAt(int, int);
 void MapGridSetMetatileIdAt(int, int, u16);
 void MapGridSetMetatileEntryAt(int, int, u16);
 void GetCameraCoords(u16*, u16*);
-bool8 MapGridIsImpassableAt(s16, s16);
+bool8 MapGridIsImpassableAt(s32, s32);
 s32 GetMapBorderIdAt(s16, s16);
 bool32 CanCameraMoveInDirection(u8);
 u16 GetBehaviorByMetatileId(u16 metatileId);
diff --git a/include/global.fieldmap.h b/include/global.fieldmap.h
index 3b3648121..c7a55fd02 100644
--- a/include/global.fieldmap.h
+++ b/include/global.fieldmap.h
@@ -63,6 +63,8 @@ struct MapData
     /*0x0c*/ u16 *map;
     /*0x10*/ struct Tileset *primaryTileset;
     /*0x14*/ struct Tileset *secondaryTileset;
+    /*0x18*/ u8 unk18;
+    /*0x19*/ u8 unk19;
 };
 
 struct BackupMapData