diff --git a/tools/build_defs/oss/yoga_defs.bzl b/tools/build_defs/oss/yoga_defs.bzl
index 4c2fe7f0..6232538f 100644
--- a/tools/build_defs/oss/yoga_defs.bzl
+++ b/tools/build_defs/oss/yoga_defs.bzl
@@ -59,6 +59,7 @@ BASE_COMPILER_FLAGS = [
     "-Werror",
     "-O2",
     "-std=c++11",
+    "-DYG_ENABLE_EVENTS",
 ]
 
 LIBRARY_COMPILER_FLAGS = BASE_COMPILER_FLAGS + [