diff --git a/TOOLS/checktree.sh b/TOOLS/checktree.sh
index 7d186b7ffa..6eb0d65ac5 100755
--- a/TOOLS/checktree.sh
+++ b/TOOLS/checktree.sh
@@ -66,7 +66,7 @@ all_filenames() {
         | grep -v "\.\#\|\~$\|\.depend\|\/\.svn\/\|config.mak\|^\./config\.h" \
         | grep -v "^\./version\.h\|\.o$\|\.a$\|configure.log\|^\./help_mp.h"
     else
-        for p in . libavcodec libavutil libavformat ; do
+        for p in . libavcodec libavutil libavformat libpostproc ; do
             svn info -R $p | sed -n \
                 '/Path:/bb; :a; d; b; :b; s/Path: /.\//; h; :c; n;
                  /Node Kind:/bd; bc; :d; /directory/ba; g; p;'