diff --git a/llvm/utils/gn/secondary/llvm/unittests/MC/BUILD.gn b/llvm/utils/gn/secondary/llvm/unittests/MC/BUILD.gn
index 6d117dce798d2f..45497d3310ea3f 100644
--- a/llvm/utils/gn/secondary/llvm/unittests/MC/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/unittests/MC/BUILD.gn
@@ -9,6 +9,7 @@ unittest("MCTests") {
   ]
   sources = [
     "Disassembler.cpp",
+    "DwarfLineTableHeaders.cpp",
     "DwarfLineTables.cpp",
     "MCDisassemblerTest.cpp",
     "MCInstPrinter.cpp",