diff --git a/raycastlib.h b/raycastlib.h
index adf19af..2ae4c10 100644
--- a/raycastlib.h
+++ b/raycastlib.h
@@ -1122,6 +1122,8 @@ static inline int16_t _RCL_drawHorizontal(
       loop(1,1)
   }
 
+  #undef loop
+
   return limit;
 }