diff --git a/benchmarks/bench_ip.cpp b/benchmarks/bench_ip.cpp
index 246c1ff..33b2c64 100644
--- a/benchmarks/bench_ip.cpp
+++ b/benchmarks/bench_ip.cpp
@@ -7,6 +7,7 @@
 #include <cstring>
 #include <random>
 #include <atomic>
+#include <string>
 event_collector collector;
 
 template <class function_type>