diff --git a/AVRsack/ASBuilder.swift b/AVRsack/ASBuilder.swift
index 143a67c..1ded38f 100644
--- a/AVRsack/ASBuilder.swift
+++ b/AVRsack/ASBuilder.swift
@@ -116,6 +116,8 @@ class ASBuilder {
             args.append("-b")
             args.append(speed!)
         }
+        let cmdLine = task!.launchPath+" "+(args as NSArray).componentsJoinedByString(" ")+"\n"
+        logOut.writeData(cmdLine.dataUsingEncoding(NSUTF8StringEncoding, allowLossyConversion: true)!)
         task!.arguments         =   args;
         task!.launch()
     }