diff --git a/structs.h b/structs.h
index 7ea02732b..87a9a3cce 100644
--- a/structs.h
+++ b/structs.h
@@ -248,8 +248,8 @@ struct SpellData
 
 struct Coord
 {
-	char x;
-	char y;
+	unsigned char x;
+	unsigned char y;
 };
 
 struct RECT8