diff --git a/lib/compiler.js b/lib/compiler.js
index 7258e6a..614d76e 100644
--- a/lib/compiler.js
+++ b/lib/compiler.js
@@ -569,7 +569,7 @@ function resolveMiddlewarePath(rootDir, middleware, config) {
 
   // Try to require the module and check if <module>.<fragment> is a valid
   // function
-  var m = require(pathName);
+  var m = require(sourceFile);
   if (typeof m[fragment] === 'function') {
     resolved.sourceFile = sourceFile;
     return resolved;