diff --git a/llvm/utils/gn/secondary/clang-tools-extra/clangd/BUILD.gn b/llvm/utils/gn/secondary/clang-tools-extra/clangd/BUILD.gn
index cc105e1e84d01..ec2db1a9e2ded 100644
--- a/llvm/utils/gn/secondary/clang-tools-extra/clangd/BUILD.gn
+++ b/llvm/utils/gn/secondary/clang-tools-extra/clangd/BUILD.gn
@@ -81,6 +81,7 @@ static_library("clangd") {
     "JSONTransport.cpp",
     "Logger.cpp",
     "ParsedAST.cpp",
+    "PathMapping.cpp",
     "Preamble.cpp",
     "Protocol.cpp",
     "Quality.cpp",
diff --git a/llvm/utils/gn/secondary/clang-tools-extra/clangd/unittests/BUILD.gn b/llvm/utils/gn/secondary/clang-tools-extra/clangd/unittests/BUILD.gn
index ac0eaee6d5cfe..2cfe0f0e13d8b 100644
--- a/llvm/utils/gn/secondary/clang-tools-extra/clangd/unittests/BUILD.gn
+++ b/llvm/utils/gn/secondary/clang-tools-extra/clangd/unittests/BUILD.gn
@@ -61,6 +61,7 @@ unittest("ClangdTests") {
     "IndexTests.cpp",
     "JSONTransportTests.cpp",
     "ParsedASTTests.cpp",
+    "PathMappingTests.cpp",
     "PrintASTTests.cpp",
     "QualityTests.cpp",
     "RIFFTests.cpp",