diff --git a/src/benchmarks/packed_vector.cpp b/src/benchmarks/packed_vector.cpp
index 62aa1634d..7049c1852 100644
--- a/src/benchmarks/packed_vector.cpp
+++ b/src/benchmarks/packed_vector.cpp
@@ -5,6 +5,7 @@
 
 #include <algorithm>
 #include <iomanip>
+#include <iostream>
 #include <numeric>
 #include <random>
 #include <string>