diff --git a/src/backend/nodes/readfuncs.c b/src/backend/nodes/readfuncs.c
index ef88209475d..08519ed298f 100644
--- a/src/backend/nodes/readfuncs.c
+++ b/src/backend/nodes/readfuncs.c
@@ -665,17 +665,6 @@ _readOpExpr(void)
 
 	READ_OID_FIELD(opno);
 	READ_OID_FIELD(opfuncid);
-
-	/*
-	 * The opfuncid is stored in the textual format primarily for debugging
-	 * and documentation reasons.  We want to always read it as zero to force
-	 * it to be re-looked-up in the pg_operator entry.  This ensures that
-	 * stored rules don't have hidden dependencies on operators' functions.
-	 * (We don't currently support an ALTER OPERATOR command, but might
-	 * someday.)
-	 */
-	local_node->opfuncid = InvalidOid;
-
 	READ_OID_FIELD(opresulttype);
 	READ_BOOL_FIELD(opretset);
 	READ_OID_FIELD(opcollid);
@@ -696,17 +685,6 @@ _readDistinctExpr(void)
 
 	READ_OID_FIELD(opno);
 	READ_OID_FIELD(opfuncid);
-
-	/*
-	 * The opfuncid is stored in the textual format primarily for debugging
-	 * and documentation reasons.  We want to always read it as zero to force
-	 * it to be re-looked-up in the pg_operator entry.  This ensures that
-	 * stored rules don't have hidden dependencies on operators' functions.
-	 * (We don't currently support an ALTER OPERATOR command, but might
-	 * someday.)
-	 */
-	local_node->opfuncid = InvalidOid;
-
 	READ_OID_FIELD(opresulttype);
 	READ_BOOL_FIELD(opretset);
 	READ_OID_FIELD(opcollid);
@@ -727,17 +705,6 @@ _readNullIfExpr(void)
 
 	READ_OID_FIELD(opno);
 	READ_OID_FIELD(opfuncid);
-
-	/*
-	 * The opfuncid is stored in the textual format primarily for debugging
-	 * and documentation reasons.  We want to always read it as zero to force
-	 * it to be re-looked-up in the pg_operator entry.  This ensures that
-	 * stored rules don't have hidden dependencies on operators' functions.
-	 * (We don't currently support an ALTER OPERATOR command, but might
-	 * someday.)
-	 */
-	local_node->opfuncid = InvalidOid;
-
 	READ_OID_FIELD(opresulttype);
 	READ_BOOL_FIELD(opretset);
 	READ_OID_FIELD(opcollid);
@@ -758,17 +725,6 @@ _readScalarArrayOpExpr(void)
 
 	READ_OID_FIELD(opno);
 	READ_OID_FIELD(opfuncid);
-
-	/*
-	 * The opfuncid is stored in the textual format primarily for debugging
-	 * and documentation reasons.  We want to always read it as zero to force
-	 * it to be re-looked-up in the pg_operator entry.  This ensures that
-	 * stored rules don't have hidden dependencies on operators' functions.
-	 * (We don't currently support an ALTER OPERATOR command, but might
-	 * someday.)
-	 */
-	local_node->opfuncid = InvalidOid;
-
 	READ_BOOL_FIELD(useOr);
 	READ_OID_FIELD(inputcollid);
 	READ_NODE_FIELD(args);