1 files changed, 4 insertions, 1 deletions
diff --git a/crawl-ref/source/misc.h b/crawl-ref/source/misc.h
index dee5163d6a..3f109eed6b 100644
--- a/crawl-ref/source/misc.h
+++ b/crawl-ref/source/misc.h
@@ -131,7 +131,10 @@ void weird_writing(char stringy[40]);
  * *********************************************************************** */
 unsigned char trap_category(unsigned char trap_type);
 
-bool grid_destroys_items( unsigned char grid );
+bool grid_is_opaque(int grid);
+bool grid_is_solid(int grid);
+bool grid_is_water(int grid);
+bool grid_destroys_items( int grid );
 
 const char *grid_item_destruction_message( unsigned char grid );