diff --git a/src/cmd/compile/internal/walk/walk.go b/src/cmd/compile/internal/walk/walk.go
index 8e4aa985bb..21cccaacf8 100644
--- a/src/cmd/compile/internal/walk/walk.go
+++ b/src/cmd/compile/internal/walk/walk.go
@@ -275,8 +275,10 @@ func backingArrayPtrLen(n ir.Node) (ptr, length ir.Node) {
 	} else {
 		ptr.SetType(n.Type().Elem().PtrTo())
 	}
+	ptr.SetTypecheck(1)
 	length = ir.NewUnaryExpr(base.Pos, ir.OLEN, n)
 	length.SetType(types.Types[types.TINT])
+	length.SetTypecheck(1)
 	return ptr, length
 }
 
diff --git a/test/fixedbugs/issue61908.go b/test/fixedbugs/issue61908.go
new file mode 100644
index 0000000000..f5d3bce678
--- /dev/null
+++ b/test/fixedbugs/issue61908.go
@@ -0,0 +1,16 @@
+// compile
+
+// Copyright 2023 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 p
+
+func f(p []byte) int {
+	switch "" < string(p) {
+	case true:
+		return 0
+	default:
+		return 1
+	}
+}