diff --git a/gRPC.podspec b/gRPC.podspec
index 775fbfd..d02704c 100644
--- a/gRPC.podspec
+++ b/gRPC.podspec
@@ -395,6 +395,7 @@
                       'src/core/transport/transport_op_string.c',
                       'src/core/census/context.c',
                       'src/core/census/initialize.c',
+                      'src/core/census/operation.c',
                       'src/core/census/record_stat.c',
                       'src/core/census/tracing.c'