diff --git a/src/checks.js b/src/checks.js
index 863473f..92acd40 100644
--- a/src/checks.js
+++ b/src/checks.js
@@ -2,12 +2,13 @@
  * Checks made on the grammar AST before compilation. Each check is a function
  * that is passed the AST and does not return anything. If the check passes, the
  * function does not do anything special, otherwise it throws
- * |PEG.GrammarError|. The checks are run in sequence in order of their
- * definition.
+ * |PEG.GrammarError|. The order in which the checks are run is specified in
+ * |PEG.compiler.compile| and should be the same as the order of definitions
+ * here.
  */
-PEG.compiler.checks = [
+PEG.compiler.checks = {
   /* Checks that all referenced rules exist. */
-  function(ast) {
+  missingReferencedRules: function(ast) {
     function nop() {}
 
     function checkExpression(node) { check(node.expression); }
@@ -55,7 +56,7 @@ PEG.compiler.checks = [
   },
 
   /* Checks that no left recursion is present. */
-  function(ast) {
+  leftRecursion: function(ast) {
     function nop() {}
 
     function checkExpression(node, appliedRules) {
@@ -116,4 +117,4 @@ PEG.compiler.checks = [
 
     check(ast, []);
   }
-];
+};
diff --git a/src/compiler.js b/src/compiler.js
index e1544d2..5578daf 100644
--- a/src/compiler.js
+++ b/src/compiler.js
@@ -8,12 +8,21 @@ PEG.compiler = {
    * cause its malfunction.
    */
   compile: function(ast) {
-    for (var i = 0; i < this.checks.length; i++) {
-      this.checks[i](ast);
+    var CHECK_NAMES = [
+      "missingReferencedRules",
+      "leftRecursion"
+    ];
+
+    var PASS_NAMES = [
+      "proxyRules"
+    ];
+
+    for (var i = 0; i < CHECK_NAMES.length; i++) {
+      this.checks[CHECK_NAMES[i]](ast);
     }
 
-    for (var i = 0; i < this.passes.length; i++) {
-      ast = this.passes[i](ast);
+    for (var i = 0; i < PASS_NAMES.length; i++) {
+      ast = this.passes[PASS_NAMES[i]](ast);
     }
 
     var source = this.emitter(ast);
diff --git a/src/passes.js b/src/passes.js
index 2d303ec..4b8ef91 100644
--- a/src/passes.js
+++ b/src/passes.js
@@ -1,14 +1,15 @@
 /*
  * Optimalization passes made on the grammar AST before compilation. Each pass
  * is a function that is passed the AST and returns a new AST. The AST can be
- * modified in-place by the pass. The passes are run in sequence in order of
- * their definition.
+ * modified in-place by the pass. The order in which the passes are run is
+ * specified in |PEG.compiler.compile| and should be the same as the order of
+ * definitions here.
  */
-PEG.compiler.passes = [
+PEG.compiler.passes = {
   /*
    * Removes proxy rules -- that is, rules that only delegate to other rule.
    */
-  function(ast) {
+  proxyRules: function(ast) {
     function isProxyRule(node) {
       return node.type === "rule" && node.expression.type === "rule_ref";
     }
@@ -76,4 +77,4 @@ PEG.compiler.passes = [
 
     return ast;
   }
-];
+};