diff --git a/CommandLines.h b/CommandLines.h
index 2d13ba3..92270b1 100644
--- a/CommandLines.h
+++ b/CommandLines.h
@@ -3,7 +3,7 @@
 
 #include <pthread.h>
 
-#define HA_VERSION "0.11-r303"
+#define HA_VERSION "0.11-r304"
 
 #define VERBOSE 0
 
diff --git a/Hash_Table.cpp b/Hash_Table.cpp
index f1eaeca..a9dbd10 100644
--- a/Hash_Table.cpp
+++ b/Hash_Table.cpp
@@ -484,6 +484,7 @@ void chain_DP(k_mer_hit* a, long long a_n, Chain_Data* dp, overlap_region* resul
             ///min distance
             distance_min = distance_pos < distance_self_pos? distance_pos:distance_self_pos;
             score = distance_min < min_score? distance_min : min_score;
+            ///need to be fixed in r305
 			///if (!a[j].good) score = (score >> 1) + (score & 1);
             if (!a[j].good) score >>= 1;