diff --git a/include/clang/AST/ASTContext.h b/include/clang/AST/ASTContext.h
index df7b43a13b875b9ef7cb7ce2d21813dccb243423..09035be0219f93531323984b429e844e2f7f5488 100644
--- a/include/clang/AST/ASTContext.h
+++ b/include/clang/AST/ASTContext.h
@@ -2229,7 +2229,7 @@ public:
   getCanonicalNestedNameSpecifier(NestedNameSpecifier *NNS) const;
 
   /// \brief Retrieves the default calling convention for the current target.
-  CallingConv getDefaultCallingConvention(bool isVariadic,
+  CallingConv getDefaultCallingConvention(bool IsVariadic,
                                           bool IsCXXMethod) const;
 
   /// \brief Retrieves the "canonical" template name that refers to a