1 files changed, 3 insertions, 2 deletions

diff --git a/src/scroll.c b/src/scroll.c
index 08ae83eeee8..1343b89c41e 100644
--- a/src/scroll.c
+++ b/src/scroll.c
@@ -262,7 +262,8 @@ do_scrolling (struct frame *frame, struct glyph_matrix *current_matrix, struct m
   for (k = 0; k < window_size; ++k)
     copy_from[k] = -1;
 
-#define CHECK_BOUNDS                                                    \
+#if GLYPH_DEBUG
+# define CHECK_BOUNDS                                                   \
   do                                                                    \
     {                                                                   \
       int k;                                                            \
@@ -271,6 +272,7 @@ do_scrolling (struct frame *frame, struct glyph_matrix *current_matrix, struct m
                  || (copy_from[k] >= 0 && copy_from[k] < window_size)); \
     }                                                                   \
   while (0);
+#endif
 
   /* When j is advanced, this corresponds to deleted lines.
      When i is advanced, this corresponds to inserted lines.  */
@@ -1035,4 +1037,3 @@ do_line_insertion_deletion_costs (FRAME_PTR frame,
                  FRAME_DELETE_COST (frame), FRAME_DELETEN_COST (frame),
                  coefficient);
 }
-