diff --git a/lldb/include/lldb/DataFormatters/FormattersHelpers.h b/lldb/include/lldb/DataFormatters/FormattersHelpers.h
index a5b0da57e5d8b9..892807063b9cef 100644
--- a/lldb/include/lldb/DataFormatters/FormattersHelpers.h
+++ b/lldb/include/lldb/DataFormatters/FormattersHelpers.h
@@ -36,11 +36,13 @@ void AddOneLineSummary(TypeCategoryImpl::SharedPointer category_sp,
                        ConstString type_name, TypeSummaryImpl::Flags flags,
                        bool regex = false);
 
+/// Add a summary that is implemented by a C++ callback.
 void AddCXXSummary(TypeCategoryImpl::SharedPointer category_sp,
                    CXXFunctionSummaryFormat::Callback funct,
                    const char *description, ConstString type_name,
                    TypeSummaryImpl::Flags flags, bool regex = false);
 
+/// Add a synthetic that is implemented by a C++ callback.
 void AddCXXSynthetic(TypeCategoryImpl::SharedPointer category_sp,
                      CXXSyntheticChildren::CreateFrontEndCallback generator,
                      const char *description, ConstString type_name,