diff --git a/lib/roken/snprintf-test.c b/lib/roken/snprintf-test.c
index 1f4ec98a3..07737b13d 100644
--- a/lib/roken/snprintf-test.c
+++ b/lib/roken/snprintf-test.c
@@ -133,9 +133,9 @@ cmp_with_sprintf_long_long (void)
 {
     int tot = 0;
     long long long_long_values[] = {
-	(long long)LONG_MIN -1, LONG_MIN, -17, -1,
+	((long long)LONG_MIN) -1, LONG_MIN, -17, -1,
 	0,
-	1, 17, 4711, 65535, LONG_MAX, (long long)LONG_MAX + 1};
+	1, 17, 4711, 65535, LONG_MAX, ((long long)LONG_MAX) + 1};
     int i;
 
     for (i = 0; i < sizeof(long_long_values) / sizeof(long_long_values[0]); ++i) {