diff --git a/llvm/include/llvm/Analysis/ScalarEvolutionExpressions.h b/llvm/include/llvm/Analysis/ScalarEvolutionExpressions.h
index 2259512825bd..264447ef86a2 100644
--- a/llvm/include/llvm/Analysis/ScalarEvolutionExpressions.h
+++ b/llvm/include/llvm/Analysis/ScalarEvolutionExpressions.h
@@ -194,6 +194,10 @@ namespace llvm {
   };
 
 
+  //===--------------------------------------------------------------------===//
+  /// SCEVNAryExpr - This node is a base class providing common
+  /// functionality for n'ary operators.
+  ///
   class SCEVNAryExpr : public SCEV {
   protected:
     std::vector<SCEVHandle> Operands;