diff --git a/src/parallel.c b/src/parallel.c
index 9d04347..cd449b2 100644
--- a/src/parallel.c
+++ b/src/parallel.c
@@ -40,6 +40,8 @@ int main(int argc, char **argv) {
     MPI_Comm_size(MPI_COMM_WORLD, &size);
     MPI_Comm_rank(MPI_COMM_WORLD, &rank);
 
+    MPI_Barrier(MPI_COMM_WORLD);
+
 #ifdef TIME
     long_long start_time = PAPI_get_real_usec();
 #endif