diff --git a/lib/fs.js b/lib/fs.js
index 50913866f9fdfd..07bc060f35e6b8 100644
--- a/lib/fs.js
+++ b/lib/fs.js
@@ -247,7 +247,7 @@ fs.readFile = function(path, options, callback) {
   req.oncomplete = readFileAfterOpen;
 
   if (context.isUserFd) {
-    process.nextTick(function() {
+    process.nextTick(function tick() {
       req.oncomplete(null, path);
     });
     return;
@@ -304,7 +304,7 @@ ReadFileContext.prototype.close = function(err) {
   this.err = err;
 
   if (this.isUserFd) {
-    process.nextTick(function() {
+    process.nextTick(function tick() {
       req.oncomplete(null);
     });
     return;
@@ -554,7 +554,7 @@ fs.read = function(fd, buffer, offset, length, position, callback) {
   length |= 0;
 
   if (length === 0) {
-    return process.nextTick(function() {
+    return process.nextTick(function tick() {
       callback && callback(null, 0, buffer);
     });
   }
@@ -1219,7 +1219,7 @@ function writeAll(fd, isUserFd, buffer, offset, length, position, callback) {
       if (isUserFd) {
         callback(writeErr);
       } else {
-        fs.close(fd, function() {
+        fs.close(fd, function close() {
           callback(writeErr);
         });
       }
diff --git a/lib/util.js b/lib/util.js
index 91404d254dc9a4..a47f6305f44895 100644
--- a/lib/util.js
+++ b/lib/util.js
@@ -276,12 +276,12 @@ function debuglog(set) {
   if (!debugs[set]) {
     if (debugEnvRegex.test(set)) {
       const pid = process.pid;
-      debugs[set] = function() {
+      debugs[set] = function debug() {
         const msg = exports.format.apply(exports, arguments);
         console.error('%s %d: %s', set, pid, msg);
       };
     } else {
-      debugs[set] = function() {};
+      debugs[set] = function debug() {};
     }
   }
   return debugs[set];