diff --git a/lib/fs.js b/lib/fs.js
index 8d2a1e044ee08f..c32b9cbe863afc 100644
--- a/lib/fs.js
+++ b/lib/fs.js
@@ -31,6 +31,7 @@ const kIoMaxLength = 2 ** 31 - 1;
 const {
   Map,
   MathMax,
+  Number,
   NumberIsSafeInteger,
   ObjectCreate,
   ObjectDefineProperties,
@@ -182,7 +183,10 @@ const isFd = isUint32;
 function isFileType(stats, fileType) {
   // Use stats array directly to avoid creating an fs.Stats instance just for
   // our internal use.
-  return (stats[1/* mode */] & S_IFMT) === fileType;
+  let mode = stats[1];
+  if (typeof mode === 'bigint')
+    mode = Number(mode);
+  return (mode & S_IFMT) === fileType;
 }
 
 function access(path, mode, callback) {
@@ -1650,7 +1654,7 @@ function realpathSync(p, options) {
 
       const baseLong = pathModule.toNamespacedPath(base);
       const ctx = { path: base };
-      const stats = binding.lstat(baseLong, false, undefined, ctx);
+      const stats = binding.lstat(baseLong, true, undefined, ctx);
       handleErrorFromBinding(ctx);
 
       if (!isFileType(stats, S_IFLNK)) {
@@ -1783,7 +1787,7 @@ function realpath(p, options, callback) {
       return process.nextTick(LOOP);
     }
 
-    return fs.lstat(base, gotStat);
+    return fs.lstat(base, { bigint: true }, gotStat);
   }
 
   function gotStat(err, stats) {