diff --git a/a8/spinlock.cc b/a8/spinlock.cc
index 4ffb55e..7d203fa 100644
--- a/a8/spinlock.cc
+++ b/a8/spinlock.cc
@@ -14,15 +14,15 @@ namespace a8
 
     }
 
-    SpinLock::lock()
+    void SpinLock::lock()
     {
         bool expect = false;
-        while (!flag_.compare_exchange_weak(except, true)) {
+        while (!flag_.compare_exchange_weak(expect, true)) {
 
         }
     }
 
-    SpinLock::unlock()
+    void SpinLock::unlock()
     {
         flag_.store(false);
     }
diff --git a/a8/spinlock.h b/a8/spinlock.h
index f8ab2b2..30b028a 100644
--- a/a8/spinlock.h
+++ b/a8/spinlock.h
@@ -17,7 +17,7 @@ namespace a8
 
     private:
 
-        std::atomic<bool> flags_;
+        std::atomic<bool> flag_;
 
     };