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-rw-r--r--util/genvif.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/util/genvif.c b/util/genvif.c
index 4891568ed7..ba217a4acf 100644
--- a/util/genvif.c
+++ b/util/genvif.c
@@ -274,6 +274,7 @@ static uint32_t bcddevice_sop(void)
}
/* Application exits on failure */
+__attribute__((__format__(__printf__, 2, 3)))
static void append(char **buf, const char *fmt, ...)
{
va_list ap1, ap2;