diff --git a/src/FqBaseBackend.cpp b/src/FqBaseBackend.cpp
index ed11036b4b837f5b3e472856234f13ffcd4d2492..714f3056223fc2d842596b0349067feb65d12051 100644
--- a/src/FqBaseBackend.cpp
+++ b/src/FqBaseBackend.cpp
@@ -19,7 +19,7 @@
 
 #include "FqBaseBackend.h"
 
-#define DEBUG
+//#define DEBUG
 #ifdef DEBUG
 #include <cassert>
 #include <iostream>
diff --git a/src/FqMainBackend.cpp b/src/FqMainBackend.cpp
index 21d56807a5db168599520970e65680448127f5a4..90c866231c6ffd52125e70c764d49f8f0cb4917f 100644
--- a/src/FqMainBackend.cpp
+++ b/src/FqMainBackend.cpp
@@ -39,7 +39,7 @@
 
 #define _FILE_OFFSET_BITS 64 // for portability reasons on 32bits systems.
 
-#define DEBUG
+//#define DEBUG
 
 #ifdef DEBUG
 #include <string.h>
@@ -93,7 +93,7 @@ void FqMainBackend::processFile(char * filename,unsigned char f_id) {
 
 
 void FqMainBackend::onEndFastqRecord(T_fq_rec_info& rec_info,const T_buf_info& bufinfo) {
-	cout<<"finished processing read at iffset:"<<rec_info.rstart_offset<<endl;
+	//cout<<"finished processing read at iffset:"<<rec_info.rstart_offset<<endl;
     rpos rp=init_rpos(f_id,rec_info.rstart_offset);
     rinfo pe2info;
     int nb_k_mer_PE2;
@@ -195,3 +195,4 @@ void FqMainBackend::writeToUndefFile(const T_buf_info& buf_info) {
 }
 */
 
+