diff --git a/runtime/process.go b/runtime/process.go
index 9915b7d..0f10aad 100644
--- a/runtime/process.go
+++ b/runtime/process.go
@@ -211,7 +211,11 @@ func (p *process) Stdio() Stdio {
 
 // Close closes any open files and/or resouces on the process
 func (p *process) Close() error {
-	return p.exitPipe.Close()
+	err := p.exitPipe.Close()
+	if cerr := p.controlPipe.Close(); err == nil {
+		err = cerr
+	}
+	return err
 }
 
 func (p *process) State() State {