diff --git a/src/file_lists.cmake b/src/file_lists.cmake
index 30c23a50d9..7ef263c7af 100644
--- a/src/file_lists.cmake
+++ b/src/file_lists.cmake
@@ -47,6 +47,7 @@ set(libprotobuf_srcs
   ${protobuf_SOURCE_DIR}/src/google/protobuf/implicit_weak_message.cc
   ${protobuf_SOURCE_DIR}/src/google/protobuf/inlined_string_field.cc
   ${protobuf_SOURCE_DIR}/src/google/protobuf/io/coded_stream.cc
+  ${protobuf_SOURCE_DIR}/src/google/protobuf/io/cpp_utils/ifndef_guard.cc
   ${protobuf_SOURCE_DIR}/src/google/protobuf/io/gzip_stream.cc
   ${protobuf_SOURCE_DIR}/src/google/protobuf/io/io_win32.cc
   ${protobuf_SOURCE_DIR}/src/google/protobuf/io/printer.cc
@@ -138,6 +139,7 @@ set(libprotobuf_hdrs
   ${protobuf_SOURCE_DIR}/src/google/protobuf/inlined_string_field.h
   ${protobuf_SOURCE_DIR}/src/google/protobuf/internal_visibility.h
   ${protobuf_SOURCE_DIR}/src/google/protobuf/io/coded_stream.h
+  ${protobuf_SOURCE_DIR}/src/google/protobuf/io/cpp_utils/ifndef_guard.h
   ${protobuf_SOURCE_DIR}/src/google/protobuf/io/gzip_stream.h
   ${protobuf_SOURCE_DIR}/src/google/protobuf/io/io_win32.h
   ${protobuf_SOURCE_DIR}/src/google/protobuf/io/printer.h