diff --git a/lib/path.js b/lib/path.js
index 4845dbb0f0b553..079177694dc65c 100644
--- a/lib/path.js
+++ b/lib/path.js
@@ -178,7 +178,7 @@ const win32 = {
         // Verify that a cwd was found and that it actually points
         // to our drive. If not, default to the drive's root.
         if (path === undefined ||
-            (StringPrototypeSlice(path, 0, 2).toLowerCase() !==
+            (StringPrototypeToLowerCase(StringPrototypeSlice(path, 0, 2)) !==
             StringPrototypeToLowerCase(resolvedDevice) &&
             StringPrototypeCharCodeAt(path, 2) === CHAR_BACKWARD_SLASH)) {
           path = `${resolvedDevice}\\`;
@@ -1410,7 +1410,7 @@ const posix = {
     return StringPrototypeSlice(path, startDot, end);
   },
 
-  format: _format.bind(null, '/'),
+  format: FunctionPrototypeBind(_format, null, '/'),
 
   /**
    * @param {string} path