diff --git a/include/llvm/Target/TargetLowering.h b/include/llvm/Target/TargetLowering.h
index 7f75fec7609..ac35737b6c5 100644
--- a/include/llvm/Target/TargetLowering.h
+++ b/include/llvm/Target/TargetLowering.h
@@ -777,7 +777,7 @@ public:
   ///
   /// This function returns true if the target allows unaligned memory accesses
   /// of the specified type in the given address space. If true, it also returns
-  /// whether the unaligned memory access is "fast" in the third argument by
+  /// whether the unaligned memory access is "fast" in the last argument by
   /// reference. This is used, for example, in situations where an array
   /// copy/move/set is converted to a sequence of store operations. Its use
   /// helps to ensure that such replacements don't generate code that causes an