diff --git a/src/box/raft.c b/src/box/raft.c
index e88e5adb66ca92a2dc2e46435111e3ccd704ac12..0b6c373e86d9369235f8954a761781af0ad0a3d7 100644
--- a/src/box/raft.c
+++ b/src/box/raft.c
@@ -271,7 +271,8 @@ raft_request_to_string(const struct raft_request *req)
 	int size = 1024;
 	char buf[1024];
 	char *pos = buf;
-	int rc = snprintf(pos, size, "{term: %llu", req->term);
+	int rc = snprintf(pos, size, "{term: %llu",
+			  (unsigned long long)req->term);
 	assert(rc >= 0);
 	pos += rc;
 	size -= rc;