diff --git a/src/bus/interface.cpp b/src/bus/interface.cpp
index 8560b3b..8f4809e 100644
--- a/src/bus/interface.cpp
+++ b/src/bus/interface.cpp
@@ -18,8 +18,8 @@ namespace sta
 
     void Interface::release()
     {
+    	acquired_ = false;
         mutex_->release();
-        acquired_ = false;
     }
 
     bool Interface::isAcquired()