diff --git a/src/net/rpc/server.go b/src/net/rpc/server.go
index cff32413a3..4920c668ea 100644
--- a/src/net/rpc/server.go
+++ b/src/net/rpc/server.go
@@ -55,6 +55,8 @@
 
 		package server
 
+		import "errors"
+
 		type Args struct {
 			A, B int
 		}