diff --git a/llvm/utils/gn/secondary/llvm/unittests/MIR/BUILD.gn b/llvm/utils/gn/secondary/llvm/unittests/MIR/BUILD.gn
index de9ca6eac71a..0d336da9b48b 100644
--- a/llvm/utils/gn/secondary/llvm/unittests/MIR/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/unittests/MIR/BUILD.gn
@@ -13,5 +13,8 @@ unittest("MIRTests") {
     "//llvm/lib/TargetParser",
     "//llvm/lib/Testing/Support",
   ]
-  sources = [ "MachineMetadata.cpp" ]
+  sources = [
+    "MachineMetadata.cpp",
+    "PassBuilderCallbacksTest.cpp",
+  ]
 }