diff --git a/libs/ysig/isup.cpp b/libs/ysig/isup.cpp
index 2269f8dd..831929f2 100644
--- a/libs/ysig/isup.cpp
+++ b/libs/ysig/isup.cpp
@@ -3613,7 +3613,6 @@ void SS7ISUP::destroyed()
     clearCalls();
     unlock();
     SignallingCallControl::attach(0);
-    SS7Layer4::attach(0);
     SS7Layer4::destroyed();
 }
 
diff --git a/libs/ysig/layer4.cpp b/libs/ysig/layer4.cpp
index 234006e4..03791f29 100644
--- a/libs/ysig/layer4.cpp
+++ b/libs/ysig/layer4.cpp
@@ -37,6 +37,12 @@ SS7Layer4::SS7Layer4(unsigned char sio, const NamedList* params)
     m_sio = getSIO(*params,sio);
 }
 
+void SS7Layer4::destroyed()
+{
+    attach(0);
+    SignallingComponent::destroyed();
+}
+
 unsigned char SS7Layer4::getSIO(const NamedList& params, unsigned char sif, unsigned char prio, unsigned char ni)
 {
     if ((prio & 0x30) == 0)
diff --git a/libs/ysig/yatesig.h b/libs/ysig/yatesig.h
index 04f866bb..51ec29bc 100644
--- a/libs/ysig/yatesig.h
+++ b/libs/ysig/yatesig.h
@@ -703,7 +703,7 @@ protected:
      * This method is called to clean up and destroy the object after the
      *  reference counter becomes zero
      */
-    void destroyed();
+    virtual void destroyed();
 
     /**
      * Insert another component in the same engine as this one.
@@ -6008,6 +6008,12 @@ private:
 class YSIG_API SS7Layer4 : public SS7L3User
 {
 public:
+    /**
+     * This method is called to clean up and destroy the object after the
+     *  reference counter becomes zero
+     */
+    virtual void destroyed();
+
     /**
      * Initialize the application layer, connect it to the SS7 router
      * @param config Optional configuration parameters override