diff --git a/include/llvm/CodeGen/SlotIndexes.h b/include/llvm/CodeGen/SlotIndexes.h
index 6eb31802120..2d98864dc9e 100644
--- a/include/llvm/CodeGen/SlotIndexes.h
+++ b/include/llvm/CodeGen/SlotIndexes.h
@@ -7,7 +7,7 @@
 //
 //===----------------------------------------------------------------------===//
 //
-// This file implements SlotIndex and related classes. The purpuse of SlotIndex
+// This file implements SlotIndex and related classes. The purpose of SlotIndex
 // is to describe a position at which a register can become live, or cease to
 // be live.
 //