diff --git a/coder_upgrade/CHANGELOG.txt b/coder_upgrade/CHANGELOG.txt
index 74c74570084ef5f91364fd267081b7336d4c5211..527c35ee00630a5243753285da962c96ca3851af 100644
--- a/coder_upgrade/CHANGELOG.txt
+++ b/coder_upgrade/CHANGELOG.txt
@@ -2,6 +2,9 @@
 
 coder_upgrade 7.x-1.x, 2009-xx-xx (development version)
 ---------------------------------
+- Changes (2009-08-24):
+   * Change calls to file_check_directory to file_prepare_directory in light of core function rename.
+
 - Changes (2009-08-17):
    * Group conversion routines by processing order (beginning, middle, or end).
    * Separate middle conversion routines into two groups (regex and parser) to utilize the PGP API.
diff --git a/coder_upgrade/coder_upgrade.install b/coder_upgrade/coder_upgrade.install
index 37f6d36f4bfbeeac4c5a34b84c93c8a840d88508..6bc808ab8f0b296f3db24c06933a704af3795739 100644
--- a/coder_upgrade/coder_upgrade.install
+++ b/coder_upgrade/coder_upgrade.install
@@ -18,19 +18,19 @@ function coder_upgrade_install() {
   // Because the core function is now recursive, we could start with the
   // subdirectories. However, this code is clean and allows for one else block.
   $dir = file_directory_path() . '/' . DEADWOOD_DIR;
-  if (file_check_directory($dir, FILE_CREATE_DIRECTORY)) {
+  if (file_prepare_directory($dir, FILE_CREATE_DIRECTORY)) {
     // Create the old and new module directories.
     $dir = file_directory_path() . '/' . DEADWOOD_OLD;
-    if (!file_check_directory($dir, FILE_CREATE_DIRECTORY)) {
+    if (!file_prepare_directory($dir, FILE_CREATE_DIRECTORY)) {
       drupal_set_message(st('The files directory at %directory can not be written to. This is the default directory searched by Coder Upgrade for modules to be converted.', array('%directory' => $dir)), 'error');
     }
     $dir = file_directory_path() . '/' . DEADWOOD_NEW;
-      if (!file_check_directory($dir, FILE_CREATE_DIRECTORY)) {
+      if (!file_prepare_directory($dir, FILE_CREATE_DIRECTORY)) {
         drupal_set_message(st('The files directory at %directory can not be written to. This is the default directory to which Coder Upgrade writes converted module code.', array('%directory' => $dir)), 'error');
     }
     // Create the patch directory.
     $dir = file_directory_path() . '/' . DEADWOOD_PATCH;
-    if (!file_check_directory($dir, FILE_CREATE_DIRECTORY)) {
+    if (!file_prepare_directory($dir, FILE_CREATE_DIRECTORY)) {
       drupal_set_message(st('The files directory at %directory can not be written to. This is the default directory to which Coder Upgrade writes patch files.', array('%directory' => $dir)), 'error');
     }
   }
@@ -73,7 +73,7 @@ function coder_upgrade_requirements($phase) {
       );
     }
     $dir = file_directory_path();
-    if (!file_check_directory($dir, FILE_CREATE_DIRECTORY)) {
+    if (!file_prepare_directory($dir, FILE_CREATE_DIRECTORY)) {
       $requirements['coder_upgrade_files'] = array(
         'title' => t('Files directory'),
         'description' => t('Your files directory at %directory can not be written to. Coder Upgrade places converted module code in subdirectories of this directory.', array('%directory' => $dir)),
@@ -83,7 +83,7 @@ function coder_upgrade_requirements($phase) {
   }
   else {
     $dir = file_directory_path() . '/' . variable_get('coder_upgrade_dir_new', DEADWOOD_NEW);
-    if (!file_check_directory($dir, FILE_CREATE_DIRECTORY)) {
+    if (!file_prepare_directory($dir, FILE_CREATE_DIRECTORY)) {
       $requirements['coder_upgrade_files'] = array(
         'title' => t('Coder Upgrade directory'),
         'description' => t('Your files directory at %directory can not be written to. Coder Upgrade places converted module code in subdirectories of this directory.', array('%directory' => $dir)),