diff --git a/test/cpp/microbenchmarks/bm_call_create.cc b/test/cpp/microbenchmarks/bm_call_create.cc
index b70bebabfdf..bb77f2151ab 100644
--- a/test/cpp/microbenchmarks/bm_call_create.cc
+++ b/test/cpp/microbenchmarks/bm_call_create.cc
@@ -34,6 +34,7 @@
 /* This benchmark exists to ensure that the benchmark integration is
  * working */
 
+#include <string.h>
 #include <sstream>
 
 #include <grpc++/support/channel_arguments.h>