diff --git a/cmake/conformance.cmake b/cmake/conformance.cmake
index 76eae8a3a..056b5d0c6 100644
--- a/cmake/conformance.cmake
+++ b/cmake/conformance.cmake
@@ -21,7 +21,6 @@ add_custom_command(
 add_executable(conformance_test_runner
   ${protobuf_source_dir}/conformance/conformance.pb.cc
   ${protobuf_source_dir}/conformance/conformance_test.cc
-  ${protobuf_source_dir}/conformance/binary_json_conformance_main.cc
   ${protobuf_source_dir}/conformance/binary_json_conformance_suite.cc
   ${protobuf_source_dir}/conformance/binary_json_conformance_suite.h
   ${protobuf_source_dir}/conformance/conformance_test_runner.cc