diff --git a/lib/compiler/passes/generate-js.js b/lib/compiler/passes/generate-js.js
index 76166cd..68d0b19 100644
--- a/lib/compiler/passes/generate-js.js
+++ b/lib/compiler/passes/generate-js.js
@@ -127,15 +127,18 @@ function generateJS( ast, options ) {
 
         }
 
-        return ast.literals.map(
-            ( c, i ) => "var " + l( i ) + " = " + buildLiteral( c ) + ";"
-        ).concat( "", ast.classes.map(
-            ( c, i ) => "var " + r( i ) + " = " + buildRegexp( c ) + ";" )
-        ).concat( "", ast.expectations.map(
-            ( c, i ) => "var " + e( i ) + " = " + buildExpectation( c ) + ";" )
-        ).concat( "", ast.functions.map(
-            ( c, i ) => "var " + f( i ) + " = " + buildFunc( c ) + ";"
-        ) ).join( "\n" );
+        return ast.literals
+            .map( ( c, i ) => "var " + l( i ) + " = " + buildLiteral( c ) + ";" )
+            .concat( "", ast.classes.map(
+                ( c, i ) => "var " + r( i ) + " = " + buildRegexp( c ) + ";"
+            ) )
+            .concat( "", ast.expectations.map(
+                ( c, i ) => "var " + e( i ) + " = " + buildExpectation( c ) + ";"
+            ) )
+            .concat( "", ast.functions.map(
+                ( c, i ) => "var " + f( i ) + " = " + buildFunc( c ) + ";"
+            ) )
+            .join( "\n" );
 
     }
 
@@ -179,7 +182,7 @@ function generateJS( ast, options ) {
                 "",
                 "  rule$expectations = cached.expectations;",
                 "  if (peg$silentFails === 0) {",
-                "    rule$expectations.map(peg$expect);",
+                "    rule$expectations.forEach(peg$expect);",
                 "  }",
                 ""
             ].join( "\n" ) );
diff --git a/lib/util/objects.js b/lib/util/objects.js
index 325e2df..4fccc0f 100644
--- a/lib/util/objects.js
+++ b/lib/util/objects.js
@@ -1,7 +1,6 @@
 "use strict";
 
 const __hasOwnProperty = Object.prototype.hasOwnProperty;
-const __slice = Array.prototype.slice;
 
 const objects = {