diff --git a/src/catch2/internal/catch_jsonwriter.hpp b/src/catch2/internal/catch_jsonwriter.hpp
index 23b56d13..8b3d2bc1 100644
--- a/src/catch2/internal/catch_jsonwriter.hpp
+++ b/src/catch2/internal/catch_jsonwriter.hpp
@@ -8,6 +8,7 @@
 #ifndef CATCH_JSONWRITER_HPP_INCLUDED
 #define CATCH_JSONWRITER_HPP_INCLUDED
 
+#include <catch2/internal/catch_lifetimebound.hpp>
 #include <catch2/internal/catch_reusable_string_stream.hpp>
 #include <catch2/internal/catch_stringref.hpp>
 
@@ -27,8 +28,8 @@ namespace Catch {
 
     class JsonValueWriter {
     public:
-        JsonValueWriter( std::ostream& os );
-        JsonValueWriter( std::ostream& os, std::uint64_t indent_level );
+        JsonValueWriter( std::ostream& os CATCH_ATTR_LIFETIMEBOUND );
+        JsonValueWriter( std::ostream& os CATCH_ATTR_LIFETIMEBOUND, std::uint64_t indent_level );
 
         JsonObjectWriter writeObject() &&;
         JsonArrayWriter writeArray() &&;
@@ -62,8 +63,8 @@ namespace Catch {
 
     class JsonObjectWriter {
     public:
-        JsonObjectWriter( std::ostream& os );
-        JsonObjectWriter( std::ostream& os, std::uint64_t indent_level );
+        JsonObjectWriter( std::ostream& os CATCH_ATTR_LIFETIMEBOUND );
+        JsonObjectWriter( std::ostream& os CATCH_ATTR_LIFETIMEBOUND, std::uint64_t indent_level );
 
         JsonObjectWriter( JsonObjectWriter&& source ) noexcept;
         JsonObjectWriter& operator=( JsonObjectWriter&& source ) = delete;
@@ -81,8 +82,8 @@ namespace Catch {
 
     class JsonArrayWriter {
     public:
-        JsonArrayWriter( std::ostream& os );
-        JsonArrayWriter( std::ostream& os, std::uint64_t indent_level );
+        JsonArrayWriter( std::ostream& os CATCH_ATTR_LIFETIMEBOUND );
+        JsonArrayWriter( std::ostream& os CATCH_ATTR_LIFETIMEBOUND, std::uint64_t indent_level );
 
         JsonArrayWriter( JsonArrayWriter&& source ) noexcept;
         JsonArrayWriter& operator=( JsonArrayWriter&& source ) = delete;
diff --git a/src/catch2/internal/catch_xmlwriter.hpp b/src/catch2/internal/catch_xmlwriter.hpp
index 22b42c5c..0b549cd7 100644
--- a/src/catch2/internal/catch_xmlwriter.hpp
+++ b/src/catch2/internal/catch_xmlwriter.hpp
@@ -8,6 +8,7 @@
 #ifndef CATCH_XMLWRITER_HPP_INCLUDED
 #define CATCH_XMLWRITER_HPP_INCLUDED
 
+#include <catch2/internal/catch_lifetimebound.hpp>
 #include <catch2/internal/catch_reusable_string_stream.hpp>
 #include <catch2/internal/catch_stringref.hpp>
 
@@ -43,7 +44,7 @@ namespace Catch {
     public:
         enum ForWhat { ForTextNodes, ForAttributes };
 
-        constexpr XmlEncode( StringRef str, ForWhat forWhat = ForTextNodes ):
+        constexpr XmlEncode( StringRef str CATCH_ATTR_LIFETIMEBOUND, ForWhat forWhat = ForTextNodes ):
             m_str( str ), m_forWhat( forWhat ) {}
 
 
@@ -61,7 +62,7 @@ namespace Catch {
 
         class ScopedElement {
         public:
-            ScopedElement( XmlWriter* writer, XmlFormatting fmt );
+            ScopedElement( XmlWriter* writer CATCH_ATTR_LIFETIMEBOUND, XmlFormatting fmt );
 
             ScopedElement( ScopedElement&& other ) noexcept;
             ScopedElement& operator=( ScopedElement&& other ) noexcept;
@@ -93,7 +94,7 @@ namespace Catch {
             XmlFormatting m_fmt;
         };
 
-        XmlWriter( std::ostream& os );
+        XmlWriter( std::ostream& os CATCH_ATTR_LIFETIMEBOUND );
         ~XmlWriter();
 
         XmlWriter( XmlWriter const& ) = delete;