diff --git a/lib/file-ext.js b/lib/file-ext.js
index dbda660..3f1bda3 100644
--- a/lib/file-ext.js
+++ b/lib/file-ext.js
@@ -19,18 +19,21 @@ exports.extend = function(obj) {
 
 var FileExt = exports.FileExt = {
 
-    eachLine: function(f, options) {
-        if (typeof options === 'function') options = {line: options, end: arguments[2]};
-        var lineType = typeof options.line
-          , endType = typeof options.end
-          ;
-        if (lineType !== 'function' && endType !== 'function')
-            throw new Error('bad arguments');
+    eachLine: function(f, optionsOrLineFn, endFn) {
+        var lineFn, hasLineFn, hasEndFn;
+        if (typeof optionsOrLineFn === 'object') {
+          lineFn = optionsOrLineFn.line;
+          endFn = optionsOrLineFn.end;
+        }
+        else if (typeof optionsOrLineFn === 'function') {
+          lineFn = optionsOrLineFn;
+        }
+        hasLineFn = typeof lineFn == 'function';
+        hasEndFn = typeof endFn == 'function';
+        if (!hasLineFn && !hasEndFn) throw new Error('bad arguments');
         var le = new LineEmitter(f);
-        if (typeof options.line === 'function')
-            le.on('line', function(line) { options.line(line); });
-        if (typeof options.end === 'function')
-            le.on('end', function() { options.end(); });
+        if (hasLineFn) le.on('line', lineFn);
+        if (hasEndFn) le.on('end', endFn);
     }
 
   , exists: function(f) {