diff --git a/term_unsupported.go b/term_unsupported.go
new file mode 100644
index 0000000..76ca931
--- /dev/null
+++ b/term_unsupported.go
@@ -0,0 +1,11 @@
+// Copyright 2019 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.
+
+// +build js,wasm nacl
+
+package term
+
+func isTerminal(fd int) bool {
+	return false
+}