diff --git a/llvm/utils/gn/secondary/lld/MachO/BUILD.gn b/llvm/utils/gn/secondary/lld/MachO/BUILD.gn
index 185ce24c7025c0..29e10d6a309e63 100644
--- a/llvm/utils/gn/secondary/lld/MachO/BUILD.gn
+++ b/llvm/utils/gn/secondary/lld/MachO/BUILD.gn
@@ -27,6 +27,7 @@ static_library("MachO2") {
     "Arch/ARM64Common.cpp",
     "Arch/ARM64_32.cpp",
     "Arch/X86_64.cpp",
+    "ConcatOutputSection.cpp",
     "Driver.cpp",
     "DriverUtils.cpp",
     "Dwarf.cpp",
@@ -35,7 +36,6 @@ static_library("MachO2") {
     "InputSection.cpp",
     "LTO.cpp",
     "MapFile.cpp",
-    "MergedOutputSection.cpp",
     "ObjC.cpp",
     "OutputSection.cpp",
     "OutputSegment.cpp",