diff --git a/labs/datalab/bits.c b/labs/datalab/bits.c
index 5600b3f..46d1fbe 100644
--- a/labs/datalab/bits.c
+++ b/labs/datalab/bits.c
@@ -163,7 +163,7 @@ int tmin(void) {
  *   Rating: 1
  */
 int isTmax(int x) {
-  return !((x + 1) ^ ~x) & !!(x + 1);
+  return !(((x + 1) ^ ~x) | !(x + 1));
 }
 /* 
  * allOddBits - return 1 if all odd-numbered bits in word set to 1