1 files changed, 1 insertions, 0 deletions

diff --git a/src/util/testpkg.c b/src/util/testpkg.c
index 96400a75..10b2f2c2 100644
--- a/src/util/testpkg.c
+++ b/src/util/testpkg.c
@@ -24,6 +24,7 @@
 
 #define BASENAME "testpkg"
 
+__attribute__((format(printf, 2, 0)))
 static void output_cb(alpm_loglevel_t level, const char *fmt, va_list args)
 {
 	if(fmt[0] == '\0') {