diff --git a/llvm/utils/gn/secondary/llvm/tools/llvm-reduce/BUILD.gn b/llvm/utils/gn/secondary/llvm/tools/llvm-reduce/BUILD.gn
index e957bd231ba36..135f331ebff01 100644
--- a/llvm/utils/gn/secondary/llvm/tools/llvm-reduce/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/tools/llvm-reduce/BUILD.gn
@@ -34,6 +34,7 @@ executable("llvm-reduce") {
     "deltas/ReduceOperands.cpp",
     "deltas/ReduceOperandsSkip.cpp",
     "deltas/ReduceOperandsToArgs.cpp",
+    "deltas/ReduceRegisterUses.cpp",
     "deltas/ReduceSpecialGlobals.cpp",
     "deltas/ReduceVirtualRegisters.cpp",
     "llvm-reduce.cpp",