diff --git a/benchmark_automation/benchmark_automation.cs b/benchmark_automation/benchmark_automation.cs
index f3ee10971c..84bd0a8d25 100644
--- a/benchmark_automation/benchmark_automation.cs
+++ b/benchmark_automation/benchmark_automation.cs
@@ -3,7 +3,6 @@
 using System.Diagnostics;
 using System.IO;
 using System.Linq;
-using System.Security.Cryptography;
 
 namespace principia {
 namespace benchmark_automation {