diff --git a/src/backend/nodes/outfuncs.c b/src/backend/nodes/outfuncs.c
index 88cde3956c..0d0ce3c203 100644
--- a/src/backend/nodes/outfuncs.c
+++ b/src/backend/nodes/outfuncs.c
@@ -1654,7 +1654,6 @@ _outPlannerGlobal(StringInfo str, PlannerGlobal *node)
 	/* NB: this isn't a complete set of fields */
 	WRITE_NODE_FIELD(paramlist);
 	WRITE_NODE_FIELD(subplans);
-	WRITE_NODE_FIELD(subroots);
 	WRITE_BITMAPSET_FIELD(rewindPlanIDs);
 	WRITE_NODE_FIELD(finalrtable);
 	WRITE_NODE_FIELD(finalrowmarks);