diff --git a/src/cmd/compile/internal/gc/select.go b/src/cmd/compile/internal/gc/select.go
index 3812a0e1fa..97e0424ce0 100644
--- a/src/cmd/compile/internal/gc/select.go
+++ b/src/cmd/compile/internal/gc/select.go
@@ -251,10 +251,8 @@ func walkselectcases(cases *Nodes) []*Node {
 	r = typecheck(r, ctxStmt)
 	init = append(init, r)
 
+	// No initialization for order; runtime.selectgo is responsible for that.
 	order := temp(types.NewArray(types.Types[TUINT16], 2*int64(ncas)))
-	r = nod(OAS, order, nil)
-	r = typecheck(r, ctxStmt)
-	init = append(init, r)
 
 	var pc0, pcs *Node
 	if flag_race {
diff --git a/src/runtime/select.go b/src/runtime/select.go
index 80768b285b..a506747910 100644
--- a/src/runtime/select.go
+++ b/src/runtime/select.go
@@ -118,6 +118,7 @@ func selectgo(cas0 *scase, order0 *uint16, pc0 *uintptr, nsends, nrecvs int, blo
 	scases := cas1[:ncases:ncases]
 	pollorder := order1[:ncases:ncases]
 	lockorder := order1[ncases:][:ncases:ncases]
+	// NOTE: pollorder/lockorder's underlying array was not zero-initialized by compiler.
 
 	// Even when raceenabled is true, there might be select
 	// statements in packages compiled without -race (e.g.,
diff --git a/test/codegen/select.go b/test/codegen/select.go
new file mode 100644
index 0000000000..4426924b36
--- /dev/null
+++ b/test/codegen/select.go
@@ -0,0 +1,20 @@
+// asmcheck
+
+// Copyright 2020 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package codegen
+
+func f() {
+	ch1 := make(chan int)
+	ch2 := make(chan int)
+	for {
+		// amd64:-`MOVQ\t[$]0, ""..autotmp_3`
+		select {
+		case <-ch1:
+		case <-ch2:
+		default:
+		}
+	}
+}