diff --git a/ftk/src/ftk.h b/ftk/src/ftk.h
index 0d27f8b..d004ece 100644
--- a/ftk/src/ftk.h
+++ b/ftk/src/ftk.h
@@ -609,6 +609,10 @@
 	****************************************************************************/
 	flminterface IF_Object
 	{
+		virtual ~IF_Object()
+		{
+		}
+
 		virtual FLMINT FLMAPI getRefCount( void) = 0;
 
 		virtual FLMINT FLMAPI AddRef( void) = 0;
diff --git a/ftk/src/ftkunix.cpp b/ftk/src/ftkunix.cpp
index 92ff89b..5d3dbdd 100644
--- a/ftk/src/ftkunix.cpp
+++ b/ftk/src/ftkunix.cpp
@@ -1554,10 +1554,10 @@ FLMINT32 posix_atomic_add_32(
 {
 	FLMINT32		i32RetVal;
 	
-	pthread_mutex_lock( gv_atomicMutex);
+	pthread_mutex_lock( &gv_atomicMutex);
 	(*piTarget) += iDelta;
 	i32RetVal = *piTarget;
-	pthread_mutex_unlock( gv_atomicMutex);
+	pthread_mutex_unlock( &gv_atomicMutex);
 	
 	return( i32RetVal);
 }
@@ -1571,10 +1571,10 @@ FLMINT32 posix_atomic_xchg_32(
 {
 	FLMINT32		i32RetVal;
 	
-	pthread_mutex_lock( gv_atomicMutex);
+	pthread_mutex_lock( &gv_atomicMutex);
 	i32RetVal = *piTarget;
 	*piTarget = iNewValue;
-	pthread_mutex_unlock( gv_atomicMutex);
+	pthread_mutex_unlock( &gv_atomicMutex);
 	
 	return( i32RetVal);
 }