1 files changed, 1 insertions, 1 deletions
diff --git a/common.h b/common.h
index 2b2bfd7..30b3cea 100644
--- a/common.h
+++ b/common.h
@@ -34,7 +34,7 @@ typedef unsigned uint;
 #define static_assert(x) _Static_assert(x, #x)
 #define in_range(x, Lo, Hi) ((uint) (x) - (Lo) <= (Hi) - (Lo)) /* lo <= x <= hi; lo > 0, hi > 0 */
 #define alignup(x, A) (((x) + ((A) - 1)) & -(A))
-#define arraylength(a) (sizeof(a) / sizeof 0[a])
+#define countof(a) (sizeof(a) / sizeof 0[a])
 
 enum { SPANFILEBITS = 10 };
 struct span {