diff --git a/build/windows/launcher/config.xml b/build/windows/launcher/config.xml
index ba29d3a06..b1fbf6630 100755
--- a/build/windows/launcher/config.xml
+++ b/build/windows/launcher/config.xml
@@ -20,6 +20,7 @@
     <cp>lib/jna.jar</cp>
     <cp>lib/ecj.jar</cp>
     <cp>lib/RXTXcomm.jar</cp>
+    <cp>lib/commons-exec-1.1.jar</cp>
   </classPath>
   <jre>
     <path>java</path>