diff --git a/modules/block/block.module b/modules/block/block.module
index e7a6ca9..54815a3 100644
--- a/modules/block/block.module
+++ b/modules/block/block.module
@@ -758,6 +758,11 @@ function block_block_list_alter(&$blocks) {
         $enabled = ($block->custom == BLOCK_CUSTOM_ENABLED);
       }
     }
+
+    // Limited visibility blocks must list at least one page.
+    if ($block->visibility == BLOCK_VISIBILITY_LISTED && empty($block->pages)) {
+      $enabled = FALSE;
+    }
     else {
       $enabled = TRUE;
     }