diff --git a/SignalHandling.md b/SignalHandling.md
index 6d1159d4..a61e6d5a 100644
--- a/SignalHandling.md
+++ b/SignalHandling.md
@@ -21,6 +21,7 @@ func main() {
 		panic(err)
 	}
 	defer os.Remove(f.Name())
+	defer f.Close()
 	sig := make(chan os.Signal, 1)
 	signal.Notify(sig, os.Interrupt)
 	<-sig