version 1
diff --git a/BUILD b/BUILD
index a19631e..a958922 100644
--- a/BUILD
+++ b/BUILD
@@ -383,6 +383,7 @@
     "src/core/census/context.c",
     "src/core/census/initialize.c",
     "src/core/census/record_stat.c",
+    "src/core/census/tracing.c",
   ],
   hdrs = [
     "include/grpc/grpc_security.h",
@@ -618,6 +619,7 @@
     "src/core/census/context.c",
     "src/core/census/initialize.c",
     "src/core/census/record_stat.c",
+    "src/core/census/tracing.c",
   ],
   hdrs = [
     "include/grpc/byte_buffer.h",
@@ -1101,6 +1103,7 @@
     "src/core/census/context.c",
     "src/core/census/initialize.c",
     "src/core/census/record_stat.c",
+    "src/core/census/tracing.c",
   ],
   hdrs = [
     "include/grpc/grpc_security.h",