diff --git a/src/malloc_hook-inl.h b/src/malloc_hook-inl.h
index 9e74ec8..b07704e 100644
--- a/src/malloc_hook-inl.h
+++ b/src/malloc_hook-inl.h
@@ -1,11 +1,11 @@
 // -*- Mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*-
 // Copyright (c) 2005, Google Inc.
 // All rights reserved.
-// 
+//
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
-// 
+//
 //     * Redistributions of source code must retain the above copyright
 // notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
@@ -15,7 +15,7 @@
 //     * Neither the name of Google Inc. nor the names of its
 // contributors may be used to endorse or promote products derived from
 // this software without specific prior written permission.
-// 
+//
 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
@@ -44,6 +44,8 @@
 #include "base/basictypes.h"
 #include <gperftools/malloc_hook.h>
 
+#include "common.h" // for UNLIKELY
+
 namespace base { namespace internal {
 
 // Capacity of 8 means that HookList is 9 words.
@@ -121,7 +123,7 @@
 }
 
 inline void MallocHook::InvokeNewHook(const void* p, size_t s) {
-  if (!base::internal::new_hooks_.empty()) {
+  if (PREDICT_FALSE(!base::internal::new_hooks_.empty())) {
     InvokeNewHookSlow(p, s);
   }
 }
@@ -132,7 +134,7 @@
 }
 
 inline void MallocHook::InvokeDeleteHook(const void* p) {
-  if (!base::internal::delete_hooks_.empty()) {
+  if (PREDICT_FALSE(!base::internal::delete_hooks_.empty())) {
     InvokeDeleteHookSlow(p);
   }
 }