diff --git a/llvm/utils/gn/secondary/llvm/lib/Target/SystemZ/BUILD.gn b/llvm/utils/gn/secondary/llvm/lib/Target/SystemZ/BUILD.gn
index 51f65f954c908..b6d2345d79a6b 100644
--- a/llvm/utils/gn/secondary/llvm/lib/Target/SystemZ/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/lib/Target/SystemZ/BUILD.gn
@@ -34,6 +34,7 @@ static_library("LLVMSystemZCodeGen") {
     "SystemZAsmPrinter.cpp",
     "SystemZCallingConv.cpp",
     "SystemZConstantPoolValue.cpp",
+    "SystemZCopyPhysRegs.cpp",
     "SystemZElimCompare.cpp",
     "SystemZFrameLowering.cpp",
     "SystemZHazardRecognizer.cpp",