diff --git a/lib/compiler.js b/lib/compiler.js
index 4055e32..830add9 100644
--- a/lib/compiler.js
+++ b/lib/compiler.js
@@ -57,7 +57,7 @@ PEG.buildParser = function(grammar, startRule) {
 
 PEG.Grammar = {};
 
-/* ===== PEG.GrammarError ===== */
+/* ===== PEG.Grammar.GrammarError ===== */
 
 /* Thrown when the grammar contains an error. */