diff --git a/electron.gyp b/electron.gyp
index 3a93783e05f3..a67a9b7a6165 100644
--- a/electron.gyp
+++ b/electron.gyp
@@ -289,6 +289,9 @@
         # Enables SkBitmap size 64 operations
         'SK_SUPPORT_LEGACY_SAFESIZE64',
 
+        # Enables flash support
+        'ENABLE_PEPPER_FLASH',
+
         # Enables widevine cdm support
         'WIDEVINE_CDM_AVAILABLE',
       ],