diff --git a/src/bin/pg_combinebackup/copy_file.h b/src/bin/pg_combinebackup/copy_file.h
index 5a8517629c7..3779edd5677 100644
--- a/src/bin/pg_combinebackup/copy_file.h
+++ b/src/bin/pg_combinebackup/copy_file.h
@@ -11,7 +11,6 @@
 #ifndef COPY_FILE_H
 #define COPY_FILE_H
 
-#include "c.h"
 #include "common/checksum_helper.h"
 
 /*
diff --git a/src/include/fe_utils/option_utils.h b/src/include/fe_utils/option_utils.h
index 82c093df996..4504bbb36a8 100644
--- a/src/include/fe_utils/option_utils.h
+++ b/src/include/fe_utils/option_utils.h
@@ -12,8 +12,6 @@
 #ifndef OPTION_UTILS_H
 #define OPTION_UTILS_H
 
-#include "postgres_fe.h"
-
 #include "common/file_utils.h"
 
 typedef void (*help_handler) (const char *progname);
diff --git a/src/include/fe_utils/query_utils.h b/src/include/fe_utils/query_utils.h
index 42e911d720a..4d7f7d60573 100644
--- a/src/include/fe_utils/query_utils.h
+++ b/src/include/fe_utils/query_utils.h
@@ -12,8 +12,6 @@
 #ifndef QUERY_UTILS_H
 #define QUERY_UTILS_H
 
-#include "postgres_fe.h"
-
 #include "libpq-fe.h"
 
 extern PGresult *executeQuery(PGconn *conn, const char *query, bool echo);