diff --git a/src/core/lib/iomgr/ev_poll_and_epoll_posix.h b/src/core/lib/iomgr/ev_poll_and_epoll_posix.h
index 4ca371f4f5a..a8b7efd471f 100644
--- a/src/core/lib/iomgr/ev_poll_and_epoll_posix.h
+++ b/src/core/lib/iomgr/ev_poll_and_epoll_posix.h
@@ -31,11 +31,11 @@
  *
  */
 
-#ifndef GRPC_CORE_IOMGR_EV_POLL_AND_EPOLL_POSIX_H
-#define GRPC_CORE_IOMGR_EV_POLL_AND_EPOLL_POSIX_H
+#ifndef GRPC_CORE_LIB_IOMGR_EV_POLL_AND_EPOLL_POSIX_H
+#define GRPC_CORE_LIB_IOMGR_EV_POLL_AND_EPOLL_POSIX_H
 
 #include "src/core/lib/iomgr/ev_posix.h"
 
 const grpc_event_engine_vtable *grpc_init_poll_and_epoll_posix(void);
 
-#endif /* GRPC_CORE_IOMGR_EV_POLL_AND_EPOLL_POSIX_H */
+#endif /* GRPC_CORE_LIB_IOMGR_EV_POLL_AND_EPOLL_POSIX_H */
diff --git a/src/core/lib/iomgr/ev_posix.h b/src/core/lib/iomgr/ev_posix.h
index 8c909f1a3f5..9d27b2bcdaa 100644
--- a/src/core/lib/iomgr/ev_posix.h
+++ b/src/core/lib/iomgr/ev_posix.h
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_CORE_IOMGR_EV_POSIX_H
-#define GRPC_CORE_IOMGR_EV_POSIX_H
+#ifndef GRPC_CORE_LIB_IOMGR_EV_POSIX_H
+#define GRPC_CORE_LIB_IOMGR_EV_POSIX_H
 
 #include <poll.h>
 
@@ -155,4 +155,4 @@ typedef int (*grpc_poll_function_type)(struct pollfd *, nfds_t, int);
 extern grpc_poll_function_type grpc_poll_function;
 extern grpc_wakeup_fd grpc_global_wakeup_fd;
 
-#endif /* GRPC_CORE_IOMGR_EV_POSIX_H */
+#endif /* GRPC_CORE_LIB_IOMGR_EV_POSIX_H */