diff --git a/main.cpp b/main.cpp
index aeba443..1c19b66 100644
--- a/main.cpp
+++ b/main.cpp
@@ -77,8 +77,8 @@ void *t_SingleAlign(void *tid) {
 	}
 	pthread_mutex_lock(&mutex_fout);
 	n_aligned+=a.n_aligned; n_unique+=a.n_unique; n_multiple+=a.n_multiple;
-	pthread_mutex_unlock(&mutex_fout);
 	read_time+=Cal_AllTime()-ref_time;
+	pthread_mutex_unlock(&mutex_fout);
 	return NULL;
 };
 
@@ -115,8 +115,8 @@ void *t_PairAlign(void *tid) {
 	n_aligned_pairs+=a.n_aligned_pairs; n_unique_pairs+=a.n_unique_pairs; n_multiple_pairs+=a.n_multiple_pairs;
 	n_aligned_a+=a.n_aligned_a; n_unique_a+=a.n_unique_a; n_multiple_a+=a.n_multiple_a;
 	n_aligned_b+=a.n_aligned_b; n_unique_b+=a.n_unique_b; n_multiple_b+=a.n_multiple_b;
-	pthread_mutex_unlock(&mutex_fout);
 	read_time+=Cal_AllTime()-ref_time;
+	pthread_mutex_unlock(&mutex_fout);
 	return NULL;		
 };