diff --git a/libc/private/WriteProtected.h b/libc/private/WriteProtected.h
index 7a6b098..69a6822 100644
--- a/libc/private/WriteProtected.h
+++ b/libc/private/WriteProtected.h
@@ -14,8 +14,7 @@
  * limitations under the License.
  */
 
-#ifndef _PRIVATE_WRITEPROTECTED_H
-#define _PRIVATE_WRITEPROTECTED_H
+#pragma once
 
 #include <errno.h>
 #include <string.h>
@@ -33,7 +32,7 @@
   char padding[PAGE_SIZE];
 
   WriteProtectedContents() = default;
-  DISALLOW_COPY_AND_ASSIGN(WriteProtectedContents);
+  BIONIC_DISALLOW_COPY_AND_ASSIGN(WriteProtectedContents);
 } __attribute__((aligned(PAGE_SIZE)));
 
 // Write protected wrapper class that aligns its contents to a page boundary,
@@ -49,7 +48,7 @@
 
  public:
   WriteProtected() = default;
-  DISALLOW_COPY_AND_ASSIGN(WriteProtected);
+  BIONIC_DISALLOW_COPY_AND_ASSIGN(WriteProtected);
 
   void initialize() {
     // Not strictly necessary, but this will hopefully segfault if we initialize
@@ -82,5 +81,3 @@
     }
   }
 };
-
-#endif