diff --git a/update.sh b/update.sh
index 75aae8b19..e95381e00 100755
--- a/update.sh
+++ b/update.sh
@@ -1,5 +1,6 @@
 #!/bin/bash
 
+sed '/macro_optional_add_subdirectory/d' -i CMakeLists.txt
 for i in *;do
     if [ -d "$i" ];then
         echo "macro_optional_add_subdirectory( $i )" >> CMakeLists.txt