diff --git a/src/backend/nodes/readfuncs.c b/src/backend/nodes/readfuncs.c
index 76cff8a2b15..aba8b11f364 100644
--- a/src/backend/nodes/readfuncs.c
+++ b/src/backend/nodes/readfuncs.c
@@ -32,7 +32,6 @@
 
 #include <math.h>
 
-#include "fmgr.h"
 #include "miscadmin.h"
 #include "nodes/extensible.h"
 #include "nodes/parsenodes.h"