diff --git a/security/sandbox/chromium/base/rand_util_win.cc b/security/sandbox/chromium/base/rand_util_win.cc
index 22fdd4da72c8..98465699b5c9 100644
--- a/security/sandbox/chromium/base/rand_util_win.cc
+++ b/security/sandbox/chromium/base/rand_util_win.cc
@@ -12,7 +12,7 @@
 // "Community Additions" comment on MSDN here:
 // http://msdn.microsoft.com/en-us/library/windows/desktop/aa387694.aspx
 #define SystemFunction036 NTAPI SystemFunction036
-#include <NTSecAPI.h>
+#include <ntsecapi.h>
 #undef SystemFunction036
 
 #include <algorithm>
diff --git a/security/sandbox/chromium/base/win/pe_image.h b/security/sandbox/chromium/base/win/pe_image.h
index 4c36bcf850e6..66897186d075 100644
--- a/security/sandbox/chromium/base/win/pe_image.h
+++ b/security/sandbox/chromium/base/win/pe_image.h
@@ -17,7 +17,7 @@
 // The Windows 8 SDK defines FACILITY_VISUALCPP in winerror.h.
 #undef FACILITY_VISUALCPP
 #endif
-#include <DelayIMP.h>
+#include <delayimp.h>
 
 namespace base {
 namespace win {
diff --git a/security/sandbox/chromium/sandbox/win/src/acl.h b/security/sandbox/chromium/sandbox/win/src/acl.h
index 7104155ee45a..661911a5b739 100644
--- a/security/sandbox/chromium/sandbox/win/src/acl.h
+++ b/security/sandbox/chromium/sandbox/win/src/acl.h
@@ -5,7 +5,7 @@
 #ifndef SANDBOX_SRC_ACL_H_
 #define SANDBOX_SRC_ACL_H_
 
-#include <AccCtrl.h>
+#include <accctrl.h>
 #include <windows.h>
 
 #include <memory>
diff --git a/security/sandbox/chromium/sandbox/win/src/broker_services.cc b/security/sandbox/chromium/sandbox/win/src/broker_services.cc
index 5f794f870781..ef7e88adead3 100644
--- a/security/sandbox/chromium/sandbox/win/src/broker_services.cc
+++ b/security/sandbox/chromium/sandbox/win/src/broker_services.cc
@@ -4,7 +4,7 @@
 
 #include "sandbox/win/src/broker_services.h"
 
-#include <AclAPI.h>
+#include <aclapi.h>
 #include <stddef.h>
 
 #include <utility>
diff --git a/security/sandbox/chromium/sandbox/win/src/sandbox_rand.cc b/security/sandbox/chromium/sandbox/win/src/sandbox_rand.cc
index b3f977374b33..92d3e721fcec 100644
--- a/security/sandbox/chromium/sandbox/win/src/sandbox_rand.cc
+++ b/security/sandbox/chromium/sandbox/win/src/sandbox_rand.cc
@@ -10,7 +10,7 @@
 // "Community Additions" comment on MSDN here:
 // http://msdn.microsoft.com/en-us/library/windows/desktop/aa387694.aspx
 #define SystemFunction036 NTAPI SystemFunction036
-#include <NTSecAPI.h>
+#include <ntsecapi.h>
 #undef SystemFunction036
 
 namespace sandbox {