diff --git a/src/backend/optimizer/util/pathnode.c b/src/backend/optimizer/util/pathnode.c
index e5c82bf687..3df00829e6 100644
--- a/src/backend/optimizer/util/pathnode.c
+++ b/src/backend/optimizer/util/pathnode.c
@@ -1609,7 +1609,7 @@ create_memoize_path(PlannerInfo *root, RelOptInfo *rel, Path *subpath,
 	pathnode->param_exprs = param_exprs;
 	pathnode->singlerow = singlerow;
 	pathnode->binary_mode = binary_mode;
-	pathnode->calls = calls;
+	pathnode->calls = clamp_row_est(calls);
 
 	/*
 	 * For now we set est_entries to 0.  cost_memoize_rescan() does all the