diff --git a/src/include/replication/walsender.h b/src/include/replication/walsender.h
index 268f8e8d0fc..60313980a99 100644
--- a/src/include/replication/walsender.h
+++ b/src/include/replication/walsender.h
@@ -12,8 +12,6 @@
 #ifndef _WALSENDER_H
 #define _WALSENDER_H
 
-#include <signal.h>
-
 /*
  * What to do with a snapshot in create replication slot command.
  */
diff --git a/src/include/replication/worker_internal.h b/src/include/replication/worker_internal.h
index 47854b5cd45..db734089374 100644
--- a/src/include/replication/worker_internal.h
+++ b/src/include/replication/worker_internal.h
@@ -12,8 +12,6 @@
 #ifndef WORKER_INTERNAL_H
 #define WORKER_INTERNAL_H
 
-#include <signal.h>
-
 #include "access/xlogdefs.h"
 #include "catalog/pg_subscription.h"
 #include "datatype/timestamp.h"