diff --git a/src/port/dirent.c b/src/port/dirent.c
index 9e1d1317ef..6219ccb469 100644
--- a/src/port/dirent.c
+++ b/src/port/dirent.c
@@ -13,7 +13,12 @@
  *-------------------------------------------------------------------------
  */
 
+#ifndef FRONTEND
 #include "postgres.h"
+#else
+#include "postgres_fe.h"
+#endif
+
 #include <dirent.h>
 
 
diff --git a/src/port/pipe.c b/src/port/pipe.c
index 0963cbba78..95839c6583 100644
--- a/src/port/pipe.c
+++ b/src/port/pipe.c
@@ -15,7 +15,11 @@
  *-------------------------------------------------------------------------
  */
 
+#ifndef FRONTEND
 #include "postgres.h"
+#else
+#include "postgres_fe.h"
+#endif
 
 #ifdef WIN32
 int
diff --git a/src/port/win32error.c b/src/port/win32error.c
index 5dfb694180..4b3b1ea7d6 100644
--- a/src/port/win32error.c
+++ b/src/port/win32error.c
@@ -11,7 +11,11 @@
  *-------------------------------------------------------------------------
  */
 
+#ifndef FRONTEND
 #include "postgres.h"
+#else
+#include "postgres_fe.h"
+#endif
 
 static const struct
 {