diff --git a/src/backend/commands/copyto.c b/src/backend/commands/copyto.c
index cef452584e5..6a0a66507ba 100644
--- a/src/backend/commands/copyto.c
+++ b/src/backend/commands/copyto.c
@@ -155,6 +120,7 @@ static void CopySendInt16(CopyToState cstate, int16 val);
 
 /* text format */
 static const CopyToRoutine CopyToRoutineText = {
+	.CopyToEstimateStateSpace = CopyToEstimateStateTextLike,