diff --git a/src/rencache.c b/src/rencache.c
index f138f4c..4e65c06 100644
--- a/src/rencache.c
+++ b/src/rencache.c
@@ -1,9 +1,9 @@
 #include <stdio.h>
 #include "rencache.h"
 
-/* a cache over the software renderer -- all drawing operations are stored
-** as commands when issued. At the end of the frame we write the commands to
-** a spatial hash, take the cells that have changed since the previous frame,
+/* a cache over the software renderer -- all drawing operations are stored as
+** commands when issued. At the end of the frame we write the commands to a grid
+** of hash values, take the cells that have changed since the previous frame,
 ** merge them into dirty rectangles and redraw only those regions */
 
 #define CELLS_X 80