diff --git a/src/parallel.c b/src/parallel.c
index cd449b2..cd7548e 100644
--- a/src/parallel.c
+++ b/src/parallel.c
@@ -182,4 +182,9 @@ void collect_results(int *match_number, int *matches) {
             MPI_INT, MASTER,
             MPI_COMM_WORLD
     );
+
+    if (rank == MASTER) {
+        free(match_numbers);
+        free(displacements);
+    }
 }