diff --git a/core/modules/node/node.module b/core/modules/node/node.module
index 15191da..84a0bd0 100644
--- a/core/modules/node/node.module
+++ b/core/modules/node/node.module
@@ -57,7 +57,7 @@
  * Modules should return this value from hook_node_access() to allow access to a
  * node.
  */
-const NODE_ACCESS_ALLOW = 'allow';
+const NODE_ACCESS_ALLOW = TRUE;
 
 /**
  * Denotes that access is denied for a node.
@@ -65,7 +65,7 @@
  * Modules should return this value from hook_node_access() to deny access to a
  * node.
  */
-const NODE_ACCESS_DENY = 'deny';
+const NODE_ACCESS_DENY = FALSE;
 
 /**
  * Denotes that access is unaffected for a node.