diff --git a/lib/compiler/passes/report-left-recursion.js b/lib/compiler/passes/report-left-recursion.js
index 5c8592d..f868b6d 100644
--- a/lib/compiler/passes/report-left-recursion.js
+++ b/lib/compiler/passes/report-left-recursion.js
@@ -1,5 +1,5 @@
 var utils        = require("../../utils"),
-    GrammarError = require("../../grammar-error.js");
+    GrammarError = require("../../grammar-error");
 
 /* Checks that no left recursion is present. */
 module.exports = function(ast) {
diff --git a/lib/compiler/passes/report-missing-rules.js b/lib/compiler/passes/report-missing-rules.js
index c1193bc..cf3afc9 100644
--- a/lib/compiler/passes/report-missing-rules.js
+++ b/lib/compiler/passes/report-missing-rules.js
@@ -1,5 +1,5 @@
 var utils        = require("../../utils"),
-    GrammarError = require("../../grammar-error.js");
+    GrammarError = require("../../grammar-error");
 
 /* Checks that all referenced rules exist. */
 module.exports = function(ast) {