diff --git a/net/error_plan9.go b/net/error_plan9.go
new file mode 100644
index 00000000..f33b6a20
--- /dev/null
+++ b/net/error_plan9.go
@@ -0,0 +1,10 @@
+//go:build plan9
+// +build plan9
+
+package net
+
+// Check if error returned by operation on a socket failed because
+// the other side has closed the connection.
+func IsConnectionBrokenError(err error) bool {
+	return false
+}