diff --git a/src/IDF/Scm/Git.php b/src/IDF/Scm/Git.php
index 9824644..89c7dfb 100644
--- a/src/IDF/Scm/Git.php
+++ b/src/IDF/Scm/Git.php
@@ -43,7 +43,7 @@ class IDF_Scm_Git extends IDF_Scm
 
     public function getRepositorySize()
     {
-        $cmd = Pluf::f('idf_exec_cmd_prefix', '').'du -sk '
+        $cmd = Pluf::f('idf_exec_cmd_prefix', '').'du -skD '
             .escapeshellarg($this->repo);
         $out = split(' ', shell_exec($cmd), 2);
         return (int) $out[0]*1024;
diff --git a/src/IDF/Scm/Mercurial.php b/src/IDF/Scm/Mercurial.php
index 507bd6f..e20e73c 100644
--- a/src/IDF/Scm/Mercurial.php
+++ b/src/IDF/Scm/Mercurial.php
@@ -35,7 +35,7 @@ class IDF_Scm_Mercurial extends IDF_Scm
 
     public function getRepositorySize()
     {
-        $cmd = Pluf::f('idf_exec_cmd_prefix', '').'du -sk '
+        $cmd = Pluf::f('idf_exec_cmd_prefix', '').'du -skD '
             .escapeshellarg($this->repo);
         $out = split(' ', shell_exec($cmd), 2);
         return (int) $out[0]*1024;
diff --git a/src/IDF/Scm/Svn.php b/src/IDF/Scm/Svn.php
index 0414ea3..2100d98 100644
--- a/src/IDF/Scm/Svn.php
+++ b/src/IDF/Scm/Svn.php
@@ -56,7 +56,7 @@ class IDF_Scm_Svn extends IDF_Scm
         if (strpos($this->repo, 'file://') !== 0) {
             return -1;
         }
-        $cmd = Pluf::f('idf_exec_cmd_prefix', '').'du -sk '
+        $cmd = Pluf::f('idf_exec_cmd_prefix', '').'du -skD '
             .escapeshellarg(substr($this->repo, 7));
         $out = split(' ', shell_exec($cmd), 2);
         return (int) $out[0]*1024;