diff --git a/src/se/hal/plugin/tellstick/TellstickParser.java b/src/se/hal/plugin/tellstick/TellstickParser.java
index 78fc902d..2546f335 100755
--- a/src/se/hal/plugin/tellstick/TellstickParser.java
+++ b/src/se/hal/plugin/tellstick/TellstickParser.java
@@ -97,7 +97,7 @@ public class TellstickParser {
     /**
      * This method blocks until a send command confirmation is received.
      */
-    public void waitSendConformation(){
+    public synchronized void waitSendConformation(){
         try {
             this.wait();
         } catch (InterruptedException e) {