diff --git a/include/external/clara.h b/include/external/clara.h
index 0971ebf5..5cd4759b 100644
--- a/include/external/clara.h
+++ b/include/external/clara.h
@@ -585,8 +585,8 @@ namespace Clara {
                 m_arg->description = description;
                 return *this;
             }
-            ArgBuilder& detail( std::string const& detail ) {
-                m_arg->detail = detail;
+            ArgBuilder& detail( std::string const& _detail ) {
+                m_arg->detail = _detail;
                 return *this;
             }
 
@@ -670,14 +670,14 @@ namespace Clara {
                 maxWidth = (std::max)( maxWidth, it->commands().size() );
 
             for( it = itBegin; it != itEnd; ++it ) {
-                Detail::Text usage( it->commands(), Detail::TextAttributes()
+                Detail::Text usageText( it->commands(), Detail::TextAttributes()
                                                         .setWidth( maxWidth+indent )
                                                         .setIndent( indent ) );
                 Detail::Text desc( it->description, Detail::TextAttributes()
                                                         .setWidth( width - maxWidth - 3 ) );
 
-                for( std::size_t i = 0; i < (std::max)( usage.size(), desc.size() ); ++i ) {
-                    std::string usageCol = i < usage.size() ? usage[i] : "";
+                for( std::size_t i = 0; i < (std::max)( usageText.size(), desc.size() ); ++i ) {
+                    std::string usageCol = i < usageText.size() ? usageText[i] : "";
                     os << usageCol;
 
                     if( i < desc.size() && !desc[i].empty() )
diff --git a/include/internal/catch_runner_impl.hpp b/include/internal/catch_runner_impl.hpp
index 5c39bcb2..98f3dfd1 100644
--- a/include/internal/catch_runner_impl.hpp
+++ b/include/internal/catch_runner_impl.hpp
@@ -59,11 +59,11 @@ namespace Catch {
 
     public:
 
-        explicit RunContext( Ptr<IConfig const> const& config, Ptr<IStreamingReporter> const& reporter )
-        :   m_runInfo( config->name() ),
+        explicit RunContext( Ptr<IConfig const> const& _config, Ptr<IStreamingReporter> const& reporter )
+        :   m_runInfo( _config->name() ),
             m_context( getCurrentMutableContext() ),
             m_activeTestCase( CATCH_NULL ),
-            m_config( config ),
+            m_config( _config ),
             m_reporter( reporter ),
             m_prevRunner( m_context.getRunner() ),
             m_prevResultCapture( m_context.getResultCapture() ),