diff --git a/cef.gyp b/cef.gyp
index 5c60e0694..5e9295a2c 100644
--- a/cef.gyp
+++ b/cef.gyp
@@ -64,6 +64,10 @@
             'cef_sandbox',
             'libcef',
           ],
+          'defines': [
+            'CEF_USE_ATL',
+            'CEF_USE_SANDBOX',
+          ],
           'configurations': {
             'Debug_Base': {
               'msvs_settings': {
@@ -247,6 +251,9 @@
             'cef_sandbox',
             'libcef',
           ],
+          'defines': [
+            'CEF_USE_SANDBOX',
+          ],
           'configurations': {
             'Debug_Base': {
               'msvs_settings': {