diff --git a/llvm/utils/gn/secondary/llvm/lib/Target/AMDGPU/BUILD.gn b/llvm/utils/gn/secondary/llvm/lib/Target/AMDGPU/BUILD.gn
index e86e40969f3cb..a3d8313fdabab 100644
--- a/llvm/utils/gn/secondary/llvm/lib/Target/AMDGPU/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/lib/Target/AMDGPU/BUILD.gn
@@ -190,6 +190,7 @@ static_library("LLVMAMDGPUCodeGen") {
     "GCNIterativeScheduler.cpp",
     "GCNMinRegStrategy.cpp",
     "GCNNSAReassign.cpp",
+    "GCNPreRALongBranchReg.cpp",
     "GCNPreRAOptimizations.cpp",
     "GCNRegPressure.cpp",
     "GCNRewritePartialRegUses.cpp",