diff --git a/star.c b/star.c
index 7ddb35a..7f8e95e 100644
--- a/star.c
+++ b/star.c
@@ -604,7 +604,7 @@ int main( int argc, char* argv[] )
                     case KEY_DOWN:
                     case KEY_LEFT:
                     case KEY_RIGHT:
-                         make_a_move( s, key );
+                         make_a_move( s, key ); /* see definition of direction up above */
                          break;
                     case ' ':
                          switch_actor( s );