diff --git a/BUILD.gn b/BUILD.gn
index f784f05..1d87424 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -206,7 +206,9 @@
     "core/fpdfdoc/cpvt_lineinfo.h",
     "core/fpdfdoc/cpvt_sectioninfo.h",
     "core/fpdfdoc/cpvt_wordinfo.h",
+    "core/fpdfdoc/csection.cpp",
     "core/fpdfdoc/csection.h",
+    "core/fpdfdoc/ctypeset.cpp",
     "core/fpdfdoc/ctypeset.h",
     "core/fpdfdoc/doc_action.cpp",
     "core/fpdfdoc/doc_annot.cpp",