diff --git a/src/core/lib/gprpp/posix/thd.cc b/src/core/lib/gprpp/posix/thd.cc
index eba7cc44fd5dd..eaad946c6ce7a 100644
--- a/src/core/lib/gprpp/posix/thd.cc
+++ b/src/core/lib/gprpp/posix/thd.cc
@@ -20,6 +20,8 @@
 
 #include <grpc/support/port_platform.h>
 
+#include <string>
+
 #include <grpc/support/time.h>
 
 #ifdef GPR_POSIX_SYNC