diff --git a/org-enclojure-repl-client/src/main/clojure/org/enclojure/ide/repl/repl_panel.clj b/org-enclojure-repl-client/src/main/clojure/org/enclojure/ide/repl/repl_panel.clj
index 87f9c6c..57d1dd1 100755
--- a/org-enclojure-repl-client/src/main/clojure/org/enclojure/ide/repl/repl_panel.clj
+++ b/org-enclojure-repl-client/src/main/clojure/org/enclojure/ide/repl/repl_panel.clj
@@ -204,6 +204,8 @@
     (.setSelected (.printStackTraceToggleButton repl-pane) bv)
   (.setSelected (.stackTraceOnErrorMenu repl-pane) bv)))
 
+(defn interrupt-repl [repl-id]
+  ((:repl-fn (org.enclojure.ide.repl.repl-manager/get-repl-config repl-id)) ":INTERRUPT"))
 
 (defn check-repl-form?
   ([expr repl-id]
diff --git a/org-enclojure-repl-client/src/main/java/org/enclojure/ide/repl/ReplPanel.form b/org-enclojure-repl-client/src/main/java/org/enclojure/ide/repl/ReplPanel.form
index 09bf82e..6023ba2 100755
--- a/org-enclojure-repl-client/src/main/java/org/enclojure/ide/repl/ReplPanel.form
+++ b/org-enclojure-repl-client/src/main/java/org/enclojure/ide/repl/ReplPanel.form
@@ -28,14 +28,14 @@
           <Group type="102" alignment="0" attributes="0">
               <Component id="replTooBar" min="-2" max="-2" attributes="0"/>
               <EmptySpace max="-2" attributes="0"/>
-              <Component id="jTabbedPane1" pref="524" max="32767" attributes="0"/>
+              <Component id="jTabbedPane1" max="32767" attributes="0"/>
           </Group>
       </Group>
     </DimensionLayout>
     <DimensionLayout dim="1">
       <Group type="103" groupAlignment="0" attributes="0">
-          <Component id="jTabbedPane1" alignment="0" pref="177" max="32767" attributes="0"/>
-          <Component id="replTooBar" alignment="0" pref="177" max="32767" attributes="0"/>
+          <Component id="jTabbedPane1" alignment="0" pref="219" max="32767" attributes="0"/>
+          <Component id="replTooBar" alignment="0" pref="219" max="32767" attributes="0"/>
       </Group>
     </DimensionLayout>
   </Layout>
@@ -207,6 +207,21 @@
             <EventHandler event="actionPerformed" listener="java.awt.event.ActionListener" parameters="java.awt.event.ActionEvent" handler="replResetButtonActionPerformed"/>
           </Events>
         </Component>
+        <Component class="javax.swing.JButton" name="replInterruptButton">
+          <Properties>
+            <Property name="icon" type="javax.swing.Icon" editor="org.netbeans.modules.form.editors2.IconEditor">
+              <Image iconType="3" name="/org/enclojure/ide/resources/interrupt.png"/>
+            </Property>
+            <Property name="toolTipText" type="java.lang.String" value="Interrupt Processing"/>
+            <Property name="focusable" type="boolean" value="false"/>
+            <Property name="horizontalTextPosition" type="int" value="0"/>
+            <Property name="label" type="java.lang.String" value=""/>
+            <Property name="verticalTextPosition" type="int" value="3"/>
+          </Properties>
+          <Events>
+            <EventHandler event="actionPerformed" listener="java.awt.event.ActionListener" parameters="java.awt.event.ActionEvent" handler="replInterruptButtonActionPerformed"/>
+          </Events>
+        </Component>
       </SubComponents>
     </Container>
   </SubComponents>
diff --git a/org-enclojure-repl-client/src/main/java/org/enclojure/ide/repl/ReplPanel.java b/org-enclojure-repl-client/src/main/java/org/enclojure/ide/repl/ReplPanel.java
index 28d6ce0..feaac1e 100755
--- a/org-enclojure-repl-client/src/main/java/org/enclojure/ide/repl/ReplPanel.java
+++ b/org-enclojure-repl-client/src/main/java/org/enclojure/ide/repl/ReplPanel.java
@@ -45,6 +45,7 @@
  */
 public class ReplPanel extends javax.swing.JPanel {
     public int _promptPos = 0;
+    volatile IFn _interruptReplFn = (IFn)RT.var("org.enclojure.ide.repl.repl-panel", "interrupt-repl");
     volatile IFn _evaluateInReplFn = (IFn)RT.var("org.enclojure.ide.repl.repl-panel", "evaluate-in-repl");
     volatile IFn _processKeyEventFunc = (IFn)RT.var("org.enclojure.ide.repl.repl-panel", "process-key-input");
     volatile IFn _dispShowHistoryEventsFunc = (IFn)RT.var("org.enclojure.ide.repl.repl-panel", "show-repl-history");
@@ -387,6 +388,7 @@ private void initComponents() {
         clearReplHistoryButton = new javax.swing.JButton();
         replStartupSettingsButton = new javax.swing.JButton();
         replResetButton = new javax.swing.JButton();
+        replInterruptButton = new javax.swing.JButton();
 
         jToolBar1.setRollover(true);
 
@@ -493,6 +495,19 @@ public void actionPerformed(java.awt.event.ActionEvent evt) {
         });
         replTooBar.add(replResetButton);
 
+        replInterruptButton.setIcon(new javax.swing.ImageIcon(getClass().getResource("/org/enclojure/ide/resources/interrupt.png"))); // NOI18N
+        replInterruptButton.setToolTipText("Interrupt Processing");
+        replInterruptButton.setFocusable(false);
+        replInterruptButton.setHorizontalTextPosition(javax.swing.SwingConstants.CENTER);
+        replInterruptButton.setLabel("");
+        replInterruptButton.setVerticalTextPosition(javax.swing.SwingConstants.BOTTOM);
+        replInterruptButton.addActionListener(new java.awt.event.ActionListener() {
+            public void actionPerformed(java.awt.event.ActionEvent evt) {
+                replInterruptButtonActionPerformed(evt);
+            }
+        });
+        replTooBar.add(replInterruptButton);
+
         javax.swing.GroupLayout layout = new javax.swing.GroupLayout(this);
         this.setLayout(layout);
         layout.setHorizontalGroup(
@@ -500,12 +515,12 @@ public void actionPerformed(java.awt.event.ActionEvent evt) {
             .addGroup(layout.createSequentialGroup()
                 .addComponent(replTooBar, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                 .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
-                .addComponent(jTabbedPane1, javax.swing.GroupLayout.DEFAULT_SIZE, 524, Short.MAX_VALUE))
+                .addComponent(jTabbedPane1))
         );
         layout.setVerticalGroup(
             layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
-            .addComponent(jTabbedPane1, javax.swing.GroupLayout.DEFAULT_SIZE, 177, Short.MAX_VALUE)
-            .addComponent(replTooBar, javax.swing.GroupLayout.DEFAULT_SIZE, 177, Short.MAX_VALUE)
+            .addComponent(jTabbedPane1, javax.swing.GroupLayout.DEFAULT_SIZE, 219, Short.MAX_VALUE)
+            .addComponent(replTooBar, javax.swing.GroupLayout.DEFAULT_SIZE, 219, Short.MAX_VALUE)
         );
     }// </editor-fold>//GEN-END:initComponents
 
@@ -545,6 +560,17 @@ private void clearReplHistoryButtonActionPerformed(java.awt.event.ActionEvent ev
         clearReplHistoryActionPerformed(evt);
     }//GEN-LAST:event_clearReplHistoryButtonActionPerformed
 
+    private void replInterruptButtonActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_replInterruptButtonActionPerformed
+        try
+        {
+            _interruptReplFn.invoke(this._replID);
+        }
+        catch (Exception ex)
+        {
+            Logger.getLogger(ReplPanel.class.getName()).log(Level.SEVERE, null, ex);
+        }
+    }//GEN-LAST:event_replInterruptButtonActionPerformed
+
 
     // Variables declaration - do not modify//GEN-BEGIN:variables
     public javax.swing.JEditorPane _replErrorPane;
@@ -559,6 +585,7 @@ private void clearReplHistoryButtonActionPerformed(java.awt.event.ActionEvent ev
     public javax.swing.JButton printStackTraceButton;
     public javax.swing.JToggleButton printStackTraceToggleButton;
     public javax.swing.JButton replHistoryButton;
+    public javax.swing.JButton replInterruptButton;
     public javax.swing.JButton replResetButton;
     public javax.swing.JButton replStartupSettingsButton;
     public javax.swing.JToolBar replTooBar;
diff --git a/org-enclojure-repl-client/src/main/resources/org/enclojure/ide/resources/interrupt.png b/org-enclojure-repl-client/src/main/resources/org/enclojure/ide/resources/interrupt.png
new file mode 100644
index 0000000..f8a5153
Binary files /dev/null and b/org-enclojure-repl-client/src/main/resources/org/enclojure/ide/resources/interrupt.png differ
diff --git a/org-enclojure-repl-server/src/main/clojure/org/enclojure/repl/main.clj b/org-enclojure-repl-server/src/main/clojure/org/enclojure/repl/main.clj
index cfcbe2c..68bb918 100755
--- a/org-enclojure-repl-server/src/main/clojure/org/enclojure/repl/main.clj
+++ b/org-enclojure-repl-server/src/main/clojure/org/enclojure/repl/main.clj
@@ -40,7 +40,8 @@
   (:refer-clojure :exclude (with-bindings))
   (:use clojure.contrib.pprint)
   (:require [clojure.contrib.pprint :as pprint]
-    [clojure.main :exclude (with-binding)])
+    [clojure.main :exclude (with-binding)]
+    [clojure.contrib.repl-utils :as repl-utils])
   (:import (java.net Socket ServerSocket)
     (java.util.logging Level Logger)
     (java.io InputStreamReader DataOutputStream DataInputStream
@@ -128,6 +129,7 @@
                                   *out* piped-out
                                   *err* (PrintWriter. *out*)]
                           (try
+                            (repl-utils/add-break-thread!)
                             (clojure.main/repl
                               :init (fn [] (in-ns 'user))
                               :read (fn [prompt exit]                                      
@@ -153,13 +155,11 @@
                             (catch java.nio.channels.ClosedByInterruptException ex)))]
     (.start (Thread. repl-thread-fn))
     {:repl-fn (fn [cmd]
-                (if (= cmd ":CLOSE-REPL")
-                  (do
-                    (.close cmd-wtr)
-                    (.close result-rdr))
-                  (do
-                    (.write cmd-wtr cmd)
-                    (.flush cmd-wtr))))
+                (cond
+                    (= cmd ":INTERRUPT") (sun.misc.Signal/raise (sun.misc.Signal. "INT"))
+                    (= cmd ":CLOSE-REPL") (do (.close cmd-wtr) (.close result-rdr))
+                    :else (do (.write cmd-wtr cmd) (.flush cmd-wtr))))
+     
      ;//??Using CharArrayWriter to build the string from each read of one byte
      ;Once there is nothing to read than this function returns the string read.
      ;Using partial so that CharArrayWriter is only created once and reused.