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-rw-r--r--src/cmd/mk/sys.std.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/cmd/mk/sys.std.h b/src/cmd/mk/sys.std.h
index 836d7ad7..fc6a4629 100644
--- a/src/cmd/mk/sys.std.h
+++ b/src/cmd/mk/sys.std.h
@@ -13,7 +13,7 @@
#define OWRITE O_WRONLY
#define ORDWR O_RDWR
#define nil 0
-#define nelem(x) sizeof((x)/sizeof((x)[0]))
+#define nelem(x) (sizeof(x)/sizeof((x)[0]))
#define seek lseek
#define remove unlink
#define exits(x) exit(x && *(char*)x ? 1 : 0)