diff --git a/ch1-basic/ch1-06-goroutine.md b/ch1-basic/ch1-06-goroutine.md
index 1a45ef9..1149297 100644
--- a/ch1-basic/ch1-06-goroutine.md
+++ b/ch1-basic/ch1-06-goroutine.md
@@ -26,7 +26,7 @@ func main() {
         mu.Lock()
     }()
 
-	mu.Unock()
+	mu.Unlock()
 }
 ```