diff --git a/runprebuild.sh b/runprebuild.sh
index e68c4812e8..d276edbee4 100755
--- a/runprebuild.sh
+++ b/runprebuild.sh
@@ -9,21 +9,34 @@ case "$1" in
   ;;
 
 
+  'autoclean')
+
+    echo y|mono bin/Prebuild.exe /clean
+
+  ;;
+
+
   'vs2010')
   
     mono bin/Prebuild.exe /target vs2010
   
   ;;
 
+
   'vs2008')
+
     mono bin/Prebuild.exe /target vs2008
+
   ;;
 
+
   *)
 
     mono bin/Prebuild.exe /target nant
     mono bin/Prebuild.exe /target vs2008
+
   ;;
 
+
 esac