diff --git a/controllers/class.RemoveDocument.php b/controllers/class.RemoveDocument.php
index e522ed268..187fec2e8 100644
--- a/controllers/class.RemoveDocument.php
+++ b/controllers/class.RemoveDocument.php
@@ -39,7 +39,7 @@ class SeedDMS_Controller_RemoveDocument extends SeedDMS_Controller_Common {
 		if(false === $this->callHook('preRemoveDocument')) {
 			if(empty($this->errormsg))
 				$this->errormsg = 'hook_preRemoveDocument_failed';
-			return null;
+			return false;
 		}
 
 		$result = $this->callHook('removeDocument', $document);
diff --git a/controllers/class.RemoveFolder.php b/controllers/class.RemoveFolder.php
index c7c4e01b0..b12c10eae 100644
--- a/controllers/class.RemoveFolder.php
+++ b/controllers/class.RemoveFolder.php
@@ -37,7 +37,7 @@ class SeedDMS_Controller_RemoveFolder extends SeedDMS_Controller_Common {
 		if(false === $this->callHook('preRemoveFolder')) {
 			if(empty($this->errormsg))
 				$this->errormsg = 'hook_preRemoveFolder_failed';
-			return null;
+			return false;
 		}
 
 		$result = $this->callHook('removeFolder', $folder);