diff --git a/lib/accesslib.php b/lib/accesslib.php
index b819cdb1c58..bc1356d0bfd 100755
--- a/lib/accesslib.php
+++ b/lib/accesslib.php
@@ -3507,8 +3507,8 @@ function fetch_context_capabilities($context) {
             $cb = get_record('block_instance', 'id', $context->instanceid);
             $block = get_record('block', 'id', $cb->blockid);
 
-            $SQL = "select * from {$CFG->prefix}capabilities where contextlevel = ".CONTEXT_BLOCK."
-                    and ( component = 'block/$block->name' or component = 'moodle')";
+            $SQL = "select * from {$CFG->prefix}capabilities where (contextlevel = ".CONTEXT_BLOCK." AND component = 'moodle')
+                    OR (component = 'block/$block->name')";
         break;
 
         default: