diff --git a/CHANGES.txt b/CHANGES.txt
index 614e590de8..dccd64b194 100644
--- a/CHANGES.txt
+++ b/CHANGES.txt
@@ -2,6 +2,7 @@
  * JMX drain to flush memtables and run through commit log (CASSANDRA-880)
  * Bootstrapping can skip ranges under the right conditions (CASSANDRA-902)
  * fix merging row versions in range_slice for CL > ONE (CASSANDRA-884)
+ * default write ConsistencyLeven chaned from ZERO to ONE
 
 
 0.6.0-beta3
diff --git a/interface/cassandra.thrift b/interface/cassandra.thrift
index 47885d31d1..0b1347cdf9 100644
--- a/interface/cassandra.thrift
+++ b/interface/cassandra.thrift
@@ -380,7 +380,7 @@ service Cassandra {
               3:required ColumnPath column_path, 
               4:required binary value, 
               5:required i64 timestamp, 
-              6:required ConsistencyLevel consistency_level=ZERO)
+              6:required ConsistencyLevel consistency_level=ONE)
        throws (1:InvalidRequestException ire, 2:UnavailableException ue, 3:TimedOutException te),
 
   /**
@@ -392,7 +392,7 @@ service Cassandra {
   void batch_insert(1:required string keyspace, 
                     2:required string key, 
                     3:required map<string, list<ColumnOrSuperColumn>> cfmap,
-                    4:required ConsistencyLevel consistency_level=ZERO)
+                    4:required ConsistencyLevel consistency_level=ONE)
        throws (1:InvalidRequestException ire, 2:UnavailableException ue, 3:TimedOutException te),
 
   /**
@@ -404,7 +404,7 @@ service Cassandra {
               2:required string key,
               3:required ColumnPath column_path,
               4:required i64 timestamp,
-              5:ConsistencyLevel consistency_level=ZERO)
+              5:ConsistencyLevel consistency_level=ONE)
        throws (1:InvalidRequestException ire, 2:UnavailableException ue, 3:TimedOutException te),
 
   /**
@@ -414,7 +414,7 @@ service Cassandra {
   **/
   void batch_mutate(1:required string keyspace,
                     2:required map<string, map<string, list<Mutation>>> mutation_map,
-                    3:required ConsistencyLevel consistency_level=ZERO)
+                    3:required ConsistencyLevel consistency_level=ONE)
        throws (1:InvalidRequestException ire, 2:UnavailableException ue, 3:TimedOutException te),
        
   // Meta-APIs -- APIs to get information about the node or cluster,
diff --git a/interface/thrift/gen-java/org/apache/cassandra/thrift/Cassandra.java b/interface/thrift/gen-java/org/apache/cassandra/thrift/Cassandra.java
index 091f211ad7..6a5a0eca0b 100644
--- a/interface/thrift/gen-java/org/apache/cassandra/thrift/Cassandra.java
+++ b/interface/thrift/gen-java/org/apache/cassandra/thrift/Cassandra.java
@@ -11215,7 +11215,7 @@ public class Cassandra {
     }
 
     public insert_args() {
-      this.consistency_level = ConsistencyLevel.ZERO;
+      this.consistency_level = ConsistencyLevel.ONE;
 
     }
 
@@ -12404,7 +12404,7 @@ public class Cassandra {
     }
 
     public batch_insert_args() {
-      this.consistency_level = ConsistencyLevel.ZERO;
+      this.consistency_level = ConsistencyLevel.ONE;
 
     }
 
@@ -13445,7 +13445,7 @@ public class Cassandra {
     }
 
     public remove_args() {
-      this.consistency_level = ConsistencyLevel.ZERO;
+      this.consistency_level = ConsistencyLevel.ONE;
 
     }
 
@@ -14539,7 +14539,7 @@ public class Cassandra {
     }
 
     public batch_mutate_args() {
-      this.consistency_level = ConsistencyLevel.ZERO;
+      this.consistency_level = ConsistencyLevel.ONE;
 
     }