diff --git a/src/core/channel/client_channel.c b/src/core/channel/client_channel.c
index 0e3ebadeabe..43a793f39e7 100644
--- a/src/core/channel/client_channel.c
+++ b/src/core/channel/client_channel.c
@@ -39,6 +39,7 @@
 #include "src/core/channel/child_channel.h"
 #include "src/core/channel/connected_channel.h"
 #include "src/core/iomgr/iomgr.h"
+#include "src/core/iomgr/pollset_set.h"
 #include "src/core/support/string.h"
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>