diff --git a/lib/CodeGen/RegisterClassInfo.cpp b/lib/CodeGen/RegisterClassInfo.cpp
index 2fde16c4a2a..a5e432de93d 100644
--- a/lib/CodeGen/RegisterClassInfo.cpp
+++ b/lib/CodeGen/RegisterClassInfo.cpp
@@ -24,9 +24,9 @@
 
 using namespace llvm;
 
-cl::opt<unsigned> StressRA("stress-regalloc", cl::Hidden, cl::init(0),
-                           cl::value_desc("N"),
-                           cl::desc("Limit all regclasses to N registers"));
+static cl::opt<unsigned>
+StressRA("stress-regalloc", cl::Hidden, cl::init(0), cl::value_desc("N"),
+         cl::desc("Limit all regclasses to N registers"));
 
 RegisterClassInfo::RegisterClassInfo() : Tag(0), MF(0), TRI(0), CalleeSaved(0)
 {}