diff --git a/smack-core/src/main/java/org/jivesoftware/smack/SmackException.java b/smack-core/src/main/java/org/jivesoftware/smack/SmackException.java
index 512445e30..cec724682 100644
--- a/smack-core/src/main/java/org/jivesoftware/smack/SmackException.java
+++ b/smack-core/src/main/java/org/jivesoftware/smack/SmackException.java
@@ -29,12 +29,12 @@ import org.jxmpp.jid.Jid;
  *
  * @author Florian Schmaus
  */
-public class SmackException extends Exception {
+public abstract class SmackException extends Exception {
 
     /**
      *
      */
-    private static final long serialVersionUID = 1844674365368214457L;
+    private static final long serialVersionUID = 1844674365368214458L;
 
     /**
      * Creates a new SmackException with the Throwable that was the root cause of the exception.
@@ -49,7 +49,7 @@ public class SmackException extends Exception {
         super(message);
     }
 
-    public SmackException(String message, Throwable wrappedThrowable) {
+    protected SmackException(String message, Throwable wrappedThrowable) {
         super(message, wrappedThrowable);
     }
 
diff --git a/smack-extensions/src/main/java/org/jivesoftware/smackx/filetransfer/IncomingFileTransfer.java b/smack-extensions/src/main/java/org/jivesoftware/smackx/filetransfer/IncomingFileTransfer.java
index b8f058370..6fadab1bc 100644
--- a/smack-extensions/src/main/java/org/jivesoftware/smackx/filetransfer/IncomingFileTransfer.java
+++ b/smack-extensions/src/main/java/org/jivesoftware/smackx/filetransfer/IncomingFileTransfer.java
@@ -198,10 +198,10 @@ public class IncomingFileTransfer extends FileTransfer {
             if (cause instanceof SmackException) {
                 throw (SmackException) cause;
             }
-            throw new SmackException("Error in execution", e);
+            throw new SmackException.SmackWrappedException("Error in execution", e);
         }
         catch (TimeoutException e) {
-            throw new SmackException("Request timed out", e);
+            throw new SmackException.SmackWrappedException("Request timed out", e);
         }
         finally {
             streamNegotiatorTask.cancel(true);
diff --git a/smack-extensions/src/main/java/org/jivesoftware/smackx/filetransfer/Socks5TransferNegotiator.java b/smack-extensions/src/main/java/org/jivesoftware/smackx/filetransfer/Socks5TransferNegotiator.java
index a123ca382..9bc29ea6a 100644
--- a/smack-extensions/src/main/java/org/jivesoftware/smackx/filetransfer/Socks5TransferNegotiator.java
+++ b/smack-extensions/src/main/java/org/jivesoftware/smackx/filetransfer/Socks5TransferNegotiator.java
@@ -56,10 +56,10 @@ public class Socks5TransferNegotiator extends StreamNegotiator {
             return this.manager.establishSession(target, streamID).getOutputStream();
         }
         catch (IOException e) {
-            throw new SmackException("error establishing SOCKS5 Bytestream", e);
+            throw new SmackException.SmackWrappedException("error establishing SOCKS5 Bytestream", e);
         }
         catch (InterruptedException e) {
-            throw new SmackException("error establishing SOCKS5 Bytestream", e);
+            throw new SmackException.SmackWrappedException("error establishing SOCKS5 Bytestream", e);
         }
     }
 
@@ -109,7 +109,7 @@ public class Socks5TransferNegotiator extends StreamNegotiator {
             return stream;
         }
         catch (IOException e) {
-            throw new SmackException("Error establishing input stream", e);
+            throw new SmackException.SmackWrappedException("Error establishing input stream", e);
         }
     }