diff --git a/lib/CodeGen/MachineBasicBlock.cpp b/lib/CodeGen/MachineBasicBlock.cpp
index 97aee996db2..813fad288e8 100644
--- a/lib/CodeGen/MachineBasicBlock.cpp
+++ b/lib/CodeGen/MachineBasicBlock.cpp
@@ -203,7 +203,7 @@ void MachineBasicBlock::print(raw_ostream &OS, SlotIndexes *Indexes) const {
     if (Indexes) OS << '\t';
     OS << "    Live Ins:";
     for (livein_iterator I = livein_begin(),E = livein_end(); I != E; ++I)
-      OS << PrintReg(*I, TRI);
+      OS << ' ' << PrintReg(*I, TRI);
     OS << '\n';
   }
   // Print the preds of this block according to the CFG.