diff --git a/lib/native/index.js b/lib/native/index.js
index 1e1d446..dd16ea8 100644
--- a/lib/native/index.js
+++ b/lib/native/index.js
@@ -119,7 +119,6 @@ Connection.prototype._pulseQueryQueue = function(initialConnection) {
       this._sendQueryPrepared(query.name, query.values||[], query.singleRowMode);
     } else {
       this._namedQuery = true;
-      this._namedQueries[query.name] = true;
       this._sendPrepare(query.name, query.text, (query.values||[]).length, query.singleRowMode);
     }
   } else if(query.values) {
@@ -200,6 +199,7 @@ var clientBuilder = function(config) {
     var q = this._activeQuery;
     //a named query finished being prepared
     if(this._namedQuery) {
+      this._namedQueries[q.name] = true;
       this._namedQuery = false;
       this._sendQueryPrepared(q.name, q.values||[]);
     } else {
diff --git a/lib/query.js b/lib/query.js
index 0c6bbc7..841e9a4 100644
--- a/lib/query.js
+++ b/lib/query.js
@@ -67,6 +67,9 @@ Query.prototype.handleDataRow = function(msg) {
 };
 
 Query.prototype.handleCommandComplete = function(msg, con) {
+  if(this.name) {
+    con.parsedStatements[this.name] = true;
+  }
   this._result.addCommandComplete(msg);
   //need to sync after each command complete of a prepared statement
   if(this.isPreparedStatement) {
@@ -137,9 +140,6 @@ Query.prototype.prepare = function(connection) {
       name: self.name,
       types: self.types
     }, true);
-    if(this.name) {
-      connection.parsedStatements[this.name] = true;
-    }
   }
 
   //TODO is there some better way to prepare values for the database?
diff --git a/test/integration/gh-issues/600-tests.js b/test/integration/gh-issues/600-tests.js
new file mode 100644
index 0000000..faf8fd8
--- /dev/null
+++ b/test/integration/gh-issues/600-tests.js
@@ -0,0 +1,58 @@
+var async = require('async');
+var helper = require('../test-helper');
+
+var db = helper.client();
+
+function createTableFoo(callback){
+    db.query("create temp table foo(column1 int, column2 int)", callback);
+}
+
+function createTableBar(callback){
+    db.query("create temp table bar(column1 text, column2 text)", callback);
+}
+
+function insertDataFoo(callback){
+    db.query({
+        name: 'insertFoo',
+        text: 'insert into foo values($1,$2)',
+        values:['one','two']
+    }, callback );
+}
+
+function insertDataBar(callback){
+    db.query({
+        name: 'insertBar',
+        text: 'insert into bar values($1,$2)',
+        values:['one','two']
+    }, callback );
+}
+
+function startTransaction(callback) {
+    db.query('BEGIN', callback);
+}
+function endTransaction(callback) {
+    db.query('COMMIT', callback);
+}
+
+function doTransaction(callback) {
+    // The transaction runs startTransaction, then all queries, then endTransaction,
+    // no matter if there has been an error in a query in the middle.
+    startTransaction(function() {
+        insertDataFoo(function() {
+            insertDataBar(function() {
+                endTransaction( callback );
+            });
+        });
+    });
+}
+
+var steps = [
+  createTableFoo,
+  createTableBar,
+  doTransaction,
+  insertDataBar
+]
+
+async.series(steps, assert.success(function() {
+  db.end()
+}))
diff --git a/test/test-helper.js b/test/test-helper.js
index acd092b..cb7e606 100644
--- a/test/test-helper.js
+++ b/test/test-helper.js
@@ -101,7 +101,7 @@ assert.success = function(callback) {
       if(err) {
         console.log(err);
       }
-      assert.isNull(err);
+      assert(!err);
       callback(arg);
     });
   } else if (callback.length === 2) {
@@ -109,7 +109,7 @@ assert.success = function(callback) {
       if(err) {
         console.log(err);
       }
-      assert.isNull(err);
+      assert(!err);
       callback(arg1, arg2);
     });
   } else {