diff --git a/lib/ajv.js b/lib/ajv.js
index 02f3d4b..3d24f51 100644
--- a/lib/ajv.js
+++ b/lib/ajv.js
@@ -14,7 +14,7 @@ var compileSchema = require('./compile')
 
 module.exports = Ajv;
 
-Ajv.prototype.compileAsync = async.compile;
+Ajv.prototype.compileAsync = require('./compile/async');
 Ajv.prototype.addKeyword = require('./keyword');
 Ajv.ValidationError = require('./compile/validation_error');
 
diff --git a/lib/async.js b/lib/async.js
index e5eac8c..ceade78 100644
--- a/lib/async.js
+++ b/lib/async.js
@@ -1,8 +1,7 @@
 'use strict';
 
 module.exports = {
-  setup: setupAsync,
-  compile: compileAsync
+  setup: setupAsync
 };
 
 
@@ -129,86 +128,3 @@ function getNodent(opts, required) {
 function nodentTranspile(code) {
   return nodent.compile(code, '', { promises: true, sourcemap: false }).code;
 }
-
-
-/**
- * Creates validating function for passed schema with asynchronous loading of missing schemas.
- * `loadSchema` option should be a function that accepts schema uri and node-style callback.
- * @this  Ajv
- * @param {Object}   schema schema object
- * @param {Function} callback node-style callback, it is always called with 2 parameters: error (or null) and validating function.
- */
-function compileAsync(schema, callback) {
-  /* eslint no-shadow: 0 */
-  /* jshint validthis: true */
-  var schemaObj;
-  var self = this;
-  try {
-    schemaObj = this._addSchema(schema);
-  } catch(e) {
-    setTimeout(function() { callback(e); });
-    return;
-  }
-  if (schemaObj.validate) {
-    setTimeout(function() { callback(null, schemaObj.validate); });
-  } else {
-    if (typeof this._opts.loadSchema != 'function')
-      throw new Error('options.loadSchema should be a function');
-    _compileAsync(schema, callback, true);
-  }
-
-
-  function _compileAsync(schema, callback, firstCall) {
-    var validate;
-    try { validate = self.compile(schema); }
-    catch(e) {
-      if (e.missingSchema) loadMissingSchema(e);
-      else deferCallback(e);
-      return;
-    }
-    deferCallback(null, validate);
-
-    function loadMissingSchema(e) {
-      var ref = e.missingSchema;
-      if (self._refs[ref] || self._schemas[ref])
-        return callback(new Error('Schema ' + ref + ' is loaded but ' + e.missingRef + ' cannot be resolved'));
-      var _callbacks = self._loadingSchemas[ref];
-      if (_callbacks) {
-        if (typeof _callbacks == 'function')
-          self._loadingSchemas[ref] = [_callbacks, schemaLoaded];
-        else
-          _callbacks[_callbacks.length] = schemaLoaded;
-      } else {
-        self._loadingSchemas[ref] = schemaLoaded;
-        self._opts.loadSchema(ref, function (err, sch) {
-          var _callbacks = self._loadingSchemas[ref];
-          delete self._loadingSchemas[ref];
-          if (typeof _callbacks == 'function') {
-            _callbacks(err, sch);
-          } else {
-            for (var i=0; i<_callbacks.length; i++)
-              _callbacks[i](err, sch);
-          }
-        });
-      }
-
-      function schemaLoaded(err, sch) {
-        if (err) return callback(err);
-        if (!(self._refs[ref] || self._schemas[ref])) {
-          try {
-            self.addSchema(sch, ref);
-          } catch(e) {
-            callback(e);
-            return;
-          }
-        }
-        _compileAsync(schema, callback);
-      }
-    }
-
-    function deferCallback(err, validate) {
-      if (firstCall) setTimeout(function() { callback(err, validate); });
-      else return callback(err, validate);
-    }
-  }
-}
diff --git a/lib/compile/async.js b/lib/compile/async.js
new file mode 100644
index 0000000..debca00
--- /dev/null
+++ b/lib/compile/async.js
@@ -0,0 +1,86 @@
+'use strict';
+
+module.exports = compileAsync;
+
+
+/**
+ * Creates validating function for passed schema with asynchronous loading of missing schemas.
+ * `loadSchema` option should be a function that accepts schema uri and node-style callback.
+ * @this  Ajv
+ * @param {Object}   schema schema object
+ * @param {Function} callback node-style callback, it is always called with 2 parameters: error (or null) and validating function.
+ */
+function compileAsync(schema, callback) {
+  /* eslint no-shadow: 0 */
+  /* jshint validthis: true */
+  var schemaObj;
+  var self = this;
+  try {
+    schemaObj = this._addSchema(schema);
+  } catch(e) {
+    setTimeout(function() { callback(e); });
+    return;
+  }
+  if (schemaObj.validate) {
+    setTimeout(function() { callback(null, schemaObj.validate); });
+  } else {
+    if (typeof this._opts.loadSchema != 'function')
+      throw new Error('options.loadSchema should be a function');
+    _compileAsync(schema, callback, true);
+  }
+
+
+  function _compileAsync(schema, callback, firstCall) {
+    var validate;
+    try { validate = self.compile(schema); }
+    catch(e) {
+      if (e.missingSchema) loadMissingSchema(e);
+      else deferCallback(e);
+      return;
+    }
+    deferCallback(null, validate);
+
+    function loadMissingSchema(e) {
+      var ref = e.missingSchema;
+      if (self._refs[ref] || self._schemas[ref])
+        return callback(new Error('Schema ' + ref + ' is loaded but ' + e.missingRef + ' cannot be resolved'));
+      var _callbacks = self._loadingSchemas[ref];
+      if (_callbacks) {
+        if (typeof _callbacks == 'function')
+          self._loadingSchemas[ref] = [_callbacks, schemaLoaded];
+        else
+          _callbacks[_callbacks.length] = schemaLoaded;
+      } else {
+        self._loadingSchemas[ref] = schemaLoaded;
+        self._opts.loadSchema(ref, function (err, sch) {
+          var _callbacks = self._loadingSchemas[ref];
+          delete self._loadingSchemas[ref];
+          if (typeof _callbacks == 'function') {
+            _callbacks(err, sch);
+          } else {
+            for (var i=0; i<_callbacks.length; i++)
+              _callbacks[i](err, sch);
+          }
+        });
+      }
+
+      function schemaLoaded(err, sch) {
+        if (err) return callback(err);
+        if (!(self._refs[ref] || self._schemas[ref])) {
+          try {
+            self.addSchema(sch, ref);
+          } catch(e) {
+            callback(e);
+            return;
+          }
+        }
+        _compileAsync(schema, callback);
+      }
+    }
+
+    function deferCallback(err, validate) {
+      if (firstCall) setTimeout(function() { callback(err, validate); });
+      else return callback(err, validate);
+    }
+  }
+}