diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp
index 9c281de4915..e8e3c5e40fd 100644
--- a/lib/Target/X86/X86ISelLowering.cpp
+++ b/lib/Target/X86/X86ISelLowering.cpp
@@ -3906,7 +3906,7 @@ static bool isUndefOrEqual(int Val, int CmpVal) {
 
 /// isSequentialOrUndefInRange - Return true if every element in Mask, beginning
 /// from position Pos and ending in Pos+Size, falls within the specified
-/// sequential range (L, L+Pos]. or is undef.
+/// sequential range (Low, Low+Size]. or is undef.
 static bool isSequentialOrUndefInRange(ArrayRef<int> Mask,
                                        unsigned Pos, unsigned Size, int Low) {
   for (unsigned i = Pos, e = Pos+Size; i != e; ++i, ++Low)