diff --git a/lib/CodeGen/LiveIntervalAnalysis.cpp b/lib/CodeGen/LiveIntervalAnalysis.cpp
index 6d0e523..7665d87 100644
--- a/lib/CodeGen/LiveIntervalAnalysis.cpp
+++ b/lib/CodeGen/LiveIntervalAnalysis.cpp
@@ -713,7 +713,7 @@
     os << " {" << li.defs.front();
     for (LiveIntervals::Interval::Defs::const_iterator
              i = next(li.defs.begin()), e = li.defs.end(); i != e; ++i)
-        os << ", " << *i;
+        os << "," << *i;
     os << "}";
 
     os << " = ";