diff --git a/include/packet.h b/include/packet.h
index bec79e2..4b779c9 100644
--- a/include/packet.h
+++ b/include/packet.h
@@ -146,8 +146,7 @@ public:
      * This calls PDU::clone on the rhs's PDU* member.
      */
     Packet(const Packet &rhs) : ts(rhs.timestamp()) {
-        if(rhs.pdu())
-            pdu_ = rhs.pdu()->clone();
+        pdu_ = rhs.pdu() ? rhs.pdu()->clone() : 0;
     }
     
     /**
@@ -175,7 +174,7 @@ public:
     /**
      * Move assignment operator.
      */
-    Packet& operator=(Packet &&rhs){ 
+    Packet& operator=(Packet &&rhs) { 
         if(this != &rhs) {
             std::swap(pdu_, rhs.pdu_);
             ts = rhs.timestamp();
@@ -232,6 +231,15 @@ public:
         pdu_ = 0;
         return some_pdu;
     }
+    
+    /**
+     * \brief Tests whether this is Packet contains a valid PDU.
+     * 
+     * \return true if pdu() == nullptr, false otherwise.
+     */
+    operator bool() const {
+        return pdu_;
+    }
 private:
     PDU *pdu_;
     Timestamp ts;