diff --git a/cryptohome/mount_namespace.cc b/cryptohome/mount_namespace.cc
index dae201a..6b9261c 100644
--- a/cryptohome/mount_namespace.cc
+++ b/cryptohome/mount_namespace.cc
@@ -14,13 +14,13 @@
 namespace cryptohome {
 
 MountNamespace::~MountNamespace() {
-  if (exists) {
+  if (exists_) {
     Destroy();
   }
 }
 
 bool MountNamespace::Create() {
-  if (exists) {
+  if (exists_) {
     LOG(ERROR) << "Non-root mount namespace at " << ns_path_.value()
                << " already exists, cannot create";
     return false;
@@ -41,12 +41,12 @@
     LOG(ERROR) << "Failed to run 'unshare " << mount
                << "--propagation=unchanged -- /bin/true'";
   }
-  exists = rc == 0;
-  return exists;
+  exists_ = rc == 0;
+  return exists_;
 }
 
 bool MountNamespace::Destroy() {
-  if (!exists) {
+  if (!exists_) {
     LOG(ERROR) << "Non-root mount namespace at " << ns_path_.value()
                << " does not exist, cannot destroy";
     return false;
@@ -59,13 +59,13 @@
     if (was_busy) {
       LOG(ERROR) << ns_path_.value() << " was busy";
     }
-    // If Unmount() fails, keep the object valid by keeping |exists| set to
+    // If Unmount() fails, keep the object valid by keeping |exists_| set to
     // true.
     return false;
   } else {
     VLOG(1) << "Unmounted namespace at " << ns_path_.value();
   }
-  exists = false;
+  exists_ = false;
   return true;
 }
 
diff --git a/cryptohome/mount_namespace.h b/cryptohome/mount_namespace.h
index ee19084..16f6c7b 100644
--- a/cryptohome/mount_namespace.h
+++ b/cryptohome/mount_namespace.h
@@ -22,7 +22,7 @@
   // destroyed when the object goes out of scope.
  public:
   MountNamespace(const base::FilePath& ns_path, Platform* platform)
-      : ns_path_(ns_path), exists(false), platform_(platform) {}
+      : ns_path_(ns_path), exists_(false), platform_(platform) {}
   ~MountNamespace();
 
   base::FilePath path() const { return ns_path_; }
@@ -32,7 +32,7 @@
 
  private:
   base::FilePath ns_path_;
-  bool exists;
+  bool exists_;
   Platform* platform_;
 
   DISALLOW_COPY_AND_ASSIGN(MountNamespace);