1 files changed, 15 insertions, 0 deletions
diff --git a/src/internal/poll/fcntl_js.go b/src/internal/poll/fcntl_js.go
new file mode 100644
index 0000000..7bf0ddc
--- /dev/null
+++ b/src/internal/poll/fcntl_js.go
@@ -0,0 +1,15 @@
+// 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.
+
+//go:build js && wasm
+// +build js,wasm
+
+package poll
+
+import "syscall"
+
+// fcntl not supported on js/wasm
+func fcntl(fd int, cmd int, arg int) (int, error) {
+	return 0, syscall.ENOSYS
+}