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-rw-r--r--os-posix.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/os-posix.c b/os-posix.c
index 00133a0c7..6321e990c 100644
--- a/os-posix.c
+++ b/os-posix.c
@@ -110,7 +110,7 @@ char *os_find_datadir(const char *argv0)
size_t len = sizeof(buf) - 1;
*buf = '\0';
- if (!sysctl(mib, sizeof(mib)/sizeof(*mib), buf, &len, NULL, 0) &&
+ if (!sysctl(mib, ARRAY_SIZE(mib), buf, &len, NULL, 0) &&
*buf) {
buf[sizeof(buf) - 1] = '\0';
p = buf;