diff --git a/include/internal/catch_compiler_capabilities.h b/include/internal/catch_compiler_capabilities.h
index db8100f0..a5847545 100644
--- a/include/internal/catch_compiler_capabilities.h
+++ b/include/internal/catch_compiler_capabilities.h
@@ -16,6 +16,7 @@
 // CATCH_CONFIG_CPP11_GENERATED_METHODS : The delete and default keywords for compiler generated methods
 // CATCH_CONFIG_CPP11_IS_ENUM : std::is_enum is supported?
 // CATCH_CONFIG_CPP11_TUPLE : std::tuple is supported
+// CATCH_CONFIG_CPP11_LONG_LONG : is long long supported?
 
 // CATCH_CONFIG_CPP11_OR_GREATER : Is C++11 supported?
 
@@ -130,6 +131,10 @@
 #    define CATCH_INTERNAL_CONFIG_VARIADIC_MACROS
 #  endif
 
+#  if !defined(CATCH_INTERNAL_CONFIG_CPP11_LONG_LONG)
+#    define CATCH_INTERNAL_CONFIG_CPP11_LONG_LONG
+#  endif
+
 #endif // __cplusplus >= 201103L
 
 // Now set the actual defines based on the above + anything the user has configured
@@ -149,7 +154,10 @@
 #   define CATCH_CONFIG_CPP11_TUPLE
 #endif
 #if defined(CATCH_INTERNAL_CONFIG_VARIADIC_MACROS) && !defined(CATCH_CONFIG_NO_VARIADIC_MACROS) && !defined(CATCH_CONFIG_VARIADIC_MACROS)
-#define CATCH_CONFIG_VARIADIC_MACROS
+#   define CATCH_CONFIG_VARIADIC_MACROS
+#endif
+#if defined(CATCH_INTERNAL_CONFIG_CPP11_LONG_LONG) && !defined(CATCH_CONFIG_NO_LONG_LONG) && !defined(CATCH_CONFIG_CPP11_LONG_LONG)
+#   define CATCH_CONFIG_CPP11_LONG_LONG
 #endif
 
 
diff --git a/include/internal/catch_evaluate.hpp b/include/internal/catch_evaluate.hpp
index ab9db784..76f19e2a 100644
--- a/include/internal/catch_evaluate.hpp
+++ b/include/internal/catch_evaluate.hpp
@@ -160,13 +160,51 @@ namespace Internal {
         return Evaluator<T*, T*, Op>::evaluate( lhs, reinterpret_cast<T*>( rhs ) );
     }
 
+#ifdef CATCH_CONFIG_CPP11_LONG_LONG
+    // long long to unsigned X
+    template<Operator Op> bool compare( long long lhs, unsigned int rhs ) {
+        return applyEvaluator<Op>( static_cast<unsigned long>( lhs ), rhs );
+    }
+    template<Operator Op> bool compare( long long lhs, unsigned long rhs ) {
+        return applyEvaluator<Op>( static_cast<unsigned long>( lhs ), rhs );
+    }
+    template<Operator Op> bool compare( long long lhs, unsigned long long rhs ) {
+        return applyEvaluator<Op>( static_cast<unsigned long>( lhs ), rhs );
+    }
+    template<Operator Op> bool compare( long long lhs, unsigned char rhs ) {
+        return applyEvaluator<Op>( static_cast<unsigned long>( lhs ), rhs );
+    }
+    
+    // unsigned long long to X
+    template<Operator Op> bool compare( unsigned long long lhs, int rhs ) {
+        return applyEvaluator<Op>( static_cast<long>( lhs ), rhs );
+    }
+    template<Operator Op> bool compare( unsigned long long lhs, long rhs ) {
+        return applyEvaluator<Op>( static_cast<long>( lhs ), rhs );
+    }
+    template<Operator Op> bool compare( unsigned long long lhs, long long rhs ) {
+        return applyEvaluator<Op>( static_cast<long>( lhs ), rhs );
+    }
+    template<Operator Op> bool compare( unsigned long long lhs, char rhs ) {
+        return applyEvaluator<Op>( static_cast<long>( lhs ), rhs );
+    }
+    
+    // pointer to long long (when comparing against NULL)
+    template<Operator Op, typename T> bool compare( long long lhs, T* rhs ) {
+        return Evaluator<T*, T*, Op>::evaluate( reinterpret_cast<T*>( lhs ), rhs );
+    }
+    template<Operator Op, typename T> bool compare( T* lhs, long long rhs ) {
+        return Evaluator<T*, T*, Op>::evaluate( lhs, reinterpret_cast<T*>( rhs ) );
+    }
+#endif // CATCH_CONFIG_CPP11_LONG_LONG
+    
 #ifdef CATCH_CONFIG_CPP11_NULLPTR
     // pointer to nullptr_t (when comparing against nullptr)
     template<Operator Op, typename T> bool compare( std::nullptr_t, T* rhs ) {
-        return Evaluator<T*, T*, Op>::evaluate( CATCH_NULL, rhs );
+        return Evaluator<T*, T*, Op>::evaluate( nullptr, rhs );
     }
     template<Operator Op, typename T> bool compare( T* lhs, std::nullptr_t ) {
-        return Evaluator<T*, T*, Op>::evaluate( lhs, CATCH_NULL );
+        return Evaluator<T*, T*, Op>::evaluate( lhs, nullptr );
     }
 #endif // CATCH_CONFIG_CPP11_NULLPTR
 
diff --git a/include/internal/catch_tostring.h b/include/internal/catch_tostring.h
index 8efb9be3..91bc106a 100644
--- a/include/internal/catch_tostring.h
+++ b/include/internal/catch_tostring.h
@@ -52,6 +52,11 @@ std::string toString( char value );
 std::string toString( signed char value );
 std::string toString( unsigned char value );
 
+#ifdef CATCH_CONFIG_CPP11_LONG_LONG
+std::string toString( long long value );
+std::string toString( unsigned long long value );
+#endif
+
 #ifdef CATCH_CONFIG_CPP11_NULLPTR
 std::string toString( std::nullptr_t );
 #endif
@@ -65,7 +70,7 @@ std::string toString( std::nullptr_t );
   
 namespace Detail {
 
-    extern std::string unprintableString;
+    extern const std::string unprintableString;
 
     struct BorgType {
         template<typename T> BorgType( T const& );
diff --git a/include/internal/catch_tostring.hpp b/include/internal/catch_tostring.hpp
index 60f8f823..50b587d1 100644
--- a/include/internal/catch_tostring.hpp
+++ b/include/internal/catch_tostring.hpp
@@ -15,9 +15,11 @@ namespace Catch {
 
 namespace Detail {
 
-    std::string unprintableString = "{?}";
-
+    const std::string unprintableString = "{?}";
+    
     namespace {
+        const int hexThreshold = 255;
+
         struct Endianness {
             enum Arch { Big, Little };
 
@@ -99,7 +101,7 @@ std::string toString( wchar_t* const value )
 std::string toString( int value ) {
     std::ostringstream oss;
     oss << value;
-    if( value >= 255 )
+    if( value > Detail::hexThreshold )
         oss << " (0x" << std::hex << value << ")";
     return oss.str();
 }
@@ -107,7 +109,7 @@ std::string toString( int value ) {
 std::string toString( unsigned long value ) {
     std::ostringstream oss;
     oss << value;
-    if( value >= 255 )
+    if( value > Detail::hexThreshold )
         oss << " (0x" << std::hex << value << ")";
     return oss.str();
 }
@@ -157,6 +159,23 @@ std::string toString( unsigned char value ) {
     return toString( static_cast<char>( value ) );
 }
 
+#ifdef CATCH_CONFIG_CPP11_LONG_LONG
+std::string toString( long long value ) {
+    std::ostringstream oss;
+    oss << value;
+    if( value > Detail::hexThreshold )
+        oss << " (0x" << std::hex << value << ")";
+    return oss.str();
+}
+std::string toString( unsigned long long value ) {
+    std::ostringstream oss;
+    oss << value;
+    if( value > Detail::hexThreshold )
+        oss << " (0x" << std::hex << value << ")";
+    return oss.str();
+}
+#endif
+    
 #ifdef CATCH_CONFIG_CPP11_NULLPTR
 std::string toString( std::nullptr_t ) {
     return "nullptr";
diff --git a/include/internal/catch_xmlwriter.hpp b/include/internal/catch_xmlwriter.hpp
index 5f2e87e5..738415c3 100644
--- a/include/internal/catch_xmlwriter.hpp
+++ b/include/internal/catch_xmlwriter.hpp
@@ -10,6 +10,7 @@
 
 #include "catch_stream.h"
 #include "catch_compiler_capabilities.h"
+#include "catch_suppress_warnings.h"
 
 #include <sstream>
 #include <string>
@@ -231,4 +232,6 @@ namespace Catch {
     };
 
 }
+#include "catch_reenable_warnings.h"
+
 #endif // TWOBLUECUBES_CATCH_XMLWRITER_HPP_INCLUDED
diff --git a/projects/SelfTest/MiscTests.cpp b/projects/SelfTest/MiscTests.cpp
index 04b86c81..8dbebea7 100644
--- a/projects/SelfTest/MiscTests.cpp
+++ b/projects/SelfTest/MiscTests.cpp
@@ -418,6 +418,14 @@ TEST_CASE( "XmlEncode" ) {
     }
 }
 
+#ifdef CATCH_CONFIG_CPP11_LONG_LONG
+TEST_CASE( "long long" ) {
+    long long l = std::numeric_limits<long long>::max();
+    
+    REQUIRE( l == std::numeric_limits<long long>::max() );
+}
+#endif
+
 //TEST_CASE( "Divide by Zero signal handler", "[.][sig]" ) {
 //    int i = 0;
 //    int x = 10/i; // This should cause the signal to fire