diff --git a/src/ROCKparams.cpp b/src/ROCKparams.cpp
index 627e9f0b2e9ba8efb5038cefe68051f44e0004ce..06c9c9f36c1c14c123c7db05246326c1cf1dc92a 100755
--- a/src/ROCKparams.cpp
+++ b/src/ROCKparams.cpp
@@ -360,7 +360,7 @@ void ROCKparams::initFromMainOptsArgs(int argc,char ** argv) {
                 break;
             case 'n':
             	char * t;
-            	cout<<optarg<<endl;
+            	//cout<<optarg<<endl;
                 nb_k_mers=strtoul(optarg,&t,10);break; // number of distinct k-mers
             case 'v':
                 verbose_mode=1;