diff --git a/lib/internal/modules/cjs/loader.js b/lib/internal/modules/cjs/loader.js
index b101f23dbe1321..428f5452c6d26d 100644
--- a/lib/internal/modules/cjs/loader.js
+++ b/lib/internal/modules/cjs/loader.js
@@ -838,7 +838,7 @@ Module.runMain = function() {
 function createRequireFromPath(filename) {
   // Allow a directory to be passed as the filename
   const trailingSlash =
-    filename.endsWith(path.sep) || path.sep !== '/' && filename.endsWith('\\');
+    filename.endsWith('/') || (isWindows && filename.endsWith('\\'));
 
   const proxyPath = trailingSlash ?
     path.join(filename, 'noop.js') :