1 files changed, 4 insertions, 4 deletions

diff --git a/src/scroll.c b/src/scroll.c
index ba012874460..6291936a541 100644
--- a/src/scroll.c
+++ b/src/scroll.c
@@ -268,10 +268,10 @@ do_scrolling (struct frame *frame, struct glyph_matrix *current_matrix,
 # define CHECK_BOUNDS                                                   \
   do                                                                    \
     {                                                                   \
-      int k;                                                            \
-      for (k = 0; k < window_size; ++k)                                 \
-        xassert (copy_from[k] == -1                                     \
-                 || (copy_from[k] >= 0 && copy_from[k] < window_size)); \
+      int ck;                                                           \
+      for (ck = 0; ck < window_size; ++ck)                              \
+        xassert (copy_from[ck] == -1                                    \
+                 || (copy_from[ck] >= 0 && copy_from[ck] < window_size)); \
     }                                                                   \
   while (0);
 #endif