diff --git a/llvm/utils/gn/secondary/clang/lib/AST/BUILD.gn b/llvm/utils/gn/secondary/clang/lib/AST/BUILD.gn
index 1eed616330eb1c..1708af8612bc28 100644
--- a/llvm/utils/gn/secondary/clang/lib/AST/BUILD.gn
+++ b/llvm/utils/gn/secondary/clang/lib/AST/BUILD.gn
@@ -97,6 +97,7 @@ static_library("AST") {
     "Interp/Context.cpp",
     "Interp/Descriptor.cpp",
     "Interp/Disasm.cpp",
+    "Interp/DynamicAllocator.cpp",
     "Interp/EvalEmitter.cpp",
     "Interp/EvaluationResult.cpp",
     "Interp/Floating.cpp",