diff --git a/src/core/lib/iomgr/tcp_posix.cc b/src/core/lib/iomgr/tcp_posix.cc
index 72e1b66..8dc1fd1 100644
--- a/src/core/lib/iomgr/tcp_posix.cc
+++ b/src/core/lib/iomgr/tcp_posix.cc
@@ -47,6 +47,7 @@
 #include <grpc/support/string_util.h>
 #include <grpc/support/sync.h>
 #include <grpc/support/time.h>
+#include <absl/strings/str_cat.h>
 
 #include "src/core/lib/address_utils/sockaddr_utils.h"
 #include "src/core/lib/debug/event_log.h"