diff --git a/third_party/WebKit/Source/build/features.gypi b/third_party/WebKit/Source/build/features.gypi
index 8633c3f66e65e..c5f9eb819a78c 100644
--- a/third_party/WebKit/Source/build/features.gypi
+++ b/third_party/WebKit/Source/build/features.gypi
@@ -52,6 +52,9 @@
       'detailed_memory_infra%': 0,
       'blink_logging_always_on%': 0,
       'link_core_modules_separately%': 1,
+
+      # WebCL support in Crosswalk.
+      'enable_webcl%': 0,
     },
     'conditions': [
       ['use_concatenated_impulse_responses==1', {
@@ -103,6 +106,12 @@
           'LINK_CORE_MODULES_SEPARATELY',
         ],
       }],
+
+      ['enable_webcl==1', {
+        'feature_defines': [
+          'ENABLE_WEBCL=1',
+        ],
+      }],
     ],
 
     # shared build only. If set to 1, link web, core and modules separately.