diff --git a/src/rock.cpp b/src/rock.cpp
index 1b31882ac25c28c779d61a415af774c00439041c..450eae0f4f90f42480ceb647a6fd30c30752910d 100755
--- a/src/rock.cpp
+++ b/src/rock.cpp
@@ -83,7 +83,7 @@ const void printVerboseInfo(const ROCKparams& Rparms,const Filter& filter,const
 	cout<<setw(40)<<left<<"expected no. distinct k-mers"<<Rparms.get_expected_nbKmers()<<endl;
 	cout<<setw(40)<<left<<"no. hash. function(s)"<<parms.lambda<<endl;
 
-	cout<<setw(40)<<left<<"expected false positive proba."<<Rparms.get_expected_collision_proba()<<" (cov. depth > 1)"<<endl;
+	cout<<setw(40)<<left<<"expected false positive proba."<<setprecision (2)<<fixed<<Rparms.get_expected_collision_proba()<<" (cov. depth > 1)"<<endl;
 
     for (int i=0;i<parms.lambda;i++) {
         string tmp="no. buckets for hash. ";
@@ -105,13 +105,13 @@ const void printVerboseInfo(const ROCKparams& Rparms,const Filter& filter,const
 	int smallest_kappa=parms.kappa;
 	if (parms.kappa_prime>0) smallest_kappa=parms.kappa_prime;
 	float p =getCollisionProba(smallest_kappa,approx_nbDiffKm,Pi_js[0],parms.lambda);
-	cout<<setw(40)<<left<<"approx. false positive proba."<<p<<endl;
+	cout<<setw(40)<<left<<"approx. false positive proba."<<setprecision (2)<<p<<endl;
 	cout<<setw(40)<<left<<"no. selected reads"<<rc.nb_output_reads<<endl;
 	for (it_pe=v_PE_files.begin();it_pe!=v_PE_files.end();it_pe++) {
 		cout<<setw(40)<<left<<"PE output files"<<it_pe->PE1.out_fq_file<<" "<<it_pe->PE2.out_fq_file<<" "<<it_pe->PE1.undef_fq_file<<" "<<it_pe->PE2.undef_fq_file<<endl;
 	}
     for (it_s=single_files.begin();it_s!=single_files.end();it_s++) {
-		cout<<setw(40)<<left<<"SE output file(s)"<<it_s->out_fq_file<<" "<<it_s->undef_fq_file<<endl;
+		cout<<setw(40)<<left<<"SE output files"<<it_s->out_fq_file<<" "<<it_s->undef_fq_file<<endl;
     }
 }