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-rw-r--r--modules/book/book.module2
1 files changed, 1 insertions, 1 deletions
diff --git a/modules/book/book.module b/modules/book/book.module
index 7651a7aa6..8ef55f4f1 100644
--- a/modules/book/book.module
+++ b/modules/book/book.module
@@ -222,7 +222,7 @@ function book_admin_paths() {
* Implements hook_init().
*/
function book_init() {
- drupal_add_css(drupal_get_path('module', 'book') . '/book.css');
+ drupal_add_css(drupal_get_path('module', 'book') . '/book.css', array('preprocess' => TRUE));
}
/**