diff --git a/common/JackMutex.h b/common/JackMutex.h
index 3b9a4fd9..9d96e157 100644
--- a/common/JackMutex.h
+++ b/common/JackMutex.h
@@ -52,6 +52,7 @@ class JackMutex
 
         JackMutex()
         {
+            // In recursive mode by default
             fMutex = CreateMutex(0, FALSE, 0);
         }
         virtual ~JackMutex()