diff --git a/src/catch2/reporters/catch_reporter_helpers.cpp b/src/catch2/reporters/catch_reporter_helpers.cpp
index 9d33384783..c4ed2bcd76 100644
--- a/src/catch2/reporters/catch_reporter_helpers.cpp
+++ b/src/catch2/reporters/catch_reporter_helpers.cpp
@@ -260,14 +260,14 @@ namespace Catch {
 
             std::string const& getSuffix() const { return m_suffix; }
             Colour::Code getColour() const { return m_colour; }
-            std::string const& getRow( size_t index ) const {
+            std::string const& getRow( std::size_t index ) const {
                 return m_rows[index];
             }
 
         private:
             std::string m_suffix;
             Colour::Code m_colour;
-            std::uint64_t m_width = 0;
+            std::size_t m_width = 0;
             std::vector<std::string> m_rows;
         };