diff --git a/lib/CodeGen/SelectionDAG/InstrEmitter.cpp b/lib/CodeGen/SelectionDAG/InstrEmitter.cpp
index 1445abe..3ba8b36 100644
--- a/lib/CodeGen/SelectionDAG/InstrEmitter.cpp
+++ b/lib/CodeGen/SelectionDAG/InstrEmitter.cpp
@@ -721,7 +721,7 @@
   // hook knows where in the block to insert the replacement code.
   MBB->insert(InsertPos, MI);
 
-  // Additional results must be an physical register def.
+  // Additional results must be physical register defs.
   if (HasPhysRegOuts) {
     for (unsigned i = II.getNumDefs(); i < NumResults; ++i) {
       unsigned Reg = II.getImplicitDefs()[i - II.getNumDefs()];