diff --git a/src/fs.js b/src/fs.js
index 2d8fc40..1c19237 100644
--- a/src/fs.js
+++ b/src/fs.js
@@ -151,6 +151,14 @@ define(function(require) {
     return this.type === MODE_SYMBOLIC_LINK;
   };
 
+  Stats.prototype.isFIFO = function() {
+    return false;
+  };
+
+  Stats.prototype.isSocket = function() {
+    return false;
+  };
+
   /*
    * Update node times. Only passed times are modified (undefined times are ignored)
    * and filesystem flags are examined in order to override update logic.