diff --git a/llvm/lib/Target/ARM/ARMSubtarget.cpp b/llvm/lib/Target/ARM/ARMSubtarget.cpp
index c1b4562..9c4f052 100644
--- a/llvm/lib/Target/ARM/ARMSubtarget.cpp
+++ b/llvm/lib/Target/ARM/ARMSubtarget.cpp
@@ -50,11 +50,13 @@
 UseFusedMulOps("arm-use-mulops",
                cl::init(true), cl::Hidden);
 
+namespace {
 enum AlignMode {
   DefaultAlign,
   StrictAlign,
   NoStrictAlign
 };
+}
 
 static cl::opt<AlignMode>
 Align(cl::desc("Load/store alignment support"),