diff --git a/src/file_lists.cmake b/src/file_lists.cmake
index e331ac378398b..0f933adb267ab 100644
--- a/src/file_lists.cmake
+++ b/src/file_lists.cmake
@@ -618,6 +618,7 @@ set(protobuf_test_files
 set(protobuf_test_protos_files
   ${protobuf_SOURCE_DIR}/src/google/protobuf/any_test.proto
   ${protobuf_SOURCE_DIR}/src/google/protobuf/map_proto2_unittest.proto
+  ${protobuf_SOURCE_DIR}/src/google/protobuf/map_proto3_unittest.proto
   ${protobuf_SOURCE_DIR}/src/google/protobuf/map_unittest.proto
   ${protobuf_SOURCE_DIR}/src/google/protobuf/unittest.proto
   ${protobuf_SOURCE_DIR}/src/google/protobuf/unittest_arena.proto