diff --git a/utils/gn/secondary/clang-tools-extra/clangd/BUILD.gn b/utils/gn/secondary/clang-tools-extra/clangd/BUILD.gn
index f75dae06b84..0f4e8dae713 100644
--- a/utils/gn/secondary/clang-tools-extra/clangd/BUILD.gn
+++ b/utils/gn/secondary/clang-tools-extra/clangd/BUILD.gn
@@ -102,6 +102,7 @@ static_library("clangd") {
     "RIFF.cpp",
     "Selection.cpp",
     "SemanticHighlighting.cpp",
+    "SemanticSelection.cpp",
     "SourceCode.cpp",
     "TUScheduler.cpp",
     "Threading.cpp",
diff --git a/utils/gn/secondary/clang-tools-extra/clangd/unittests/BUILD.gn b/utils/gn/secondary/clang-tools-extra/clangd/unittests/BUILD.gn
index eea48f3c8e8..ee773574d5a 100644
--- a/utils/gn/secondary/clang-tools-extra/clangd/unittests/BUILD.gn
+++ b/utils/gn/secondary/clang-tools-extra/clangd/unittests/BUILD.gn
@@ -63,6 +63,7 @@ unittest("ClangdTests") {
     "RenameTests.cpp",
     "SelectionTests.cpp",
     "SemanticHighlightingTests.cpp",
+    "SemanticSelectionTests.cpp",
     "SerializationTests.cpp",
     "SourceCodeTests.cpp",
     "SymbolCollectorTests.cpp",