diff --git a/src/test_lib_json/jsontest.cpp b/src/test_lib_json/jsontest.cpp
index 02e7b21..13d1e35 100644
--- a/src/test_lib_json/jsontest.cpp
+++ b/src/test_lib_json/jsontest.cpp
@@ -275,6 +275,25 @@ TestResult::operator << ( unsigned int value )
 }
 
 
+#ifdef JSON_HAS_INT64
+TestResult &
+TestResult::operator << ( Json::Int64 value )
+{
+   char buffer[32];
+   sprintf( buffer, "%lld", value );
+   return addToLastFailure( buffer );
+}
+
+TestResult &
+TestResult::operator << ( Json::UInt64 value )
+{
+   char buffer[32];
+   sprintf( buffer, "%ull", value );
+   return addToLastFailure( buffer );
+}
+#endif
+
+
 TestResult &
 TestResult::operator << ( double value )
 {
diff --git a/src/test_lib_json/jsontest.h b/src/test_lib_json/jsontest.h
index 0d07238..5d0eb1a 100644
--- a/src/test_lib_json/jsontest.h
+++ b/src/test_lib_json/jsontest.h
@@ -87,6 +87,10 @@ namespace JsonTest {
       TestResult &operator << ( bool value );
       TestResult &operator << ( int value );
       TestResult &operator << ( unsigned int value );
+#ifdef JSON_HAS_INT64
+      TestResult &operator << ( Json::Int64 value );
+      TestResult &operator << ( Json::UInt64 value );
+#endif
       TestResult &operator << ( double value );
       TestResult &operator << ( const char *value );
       TestResult &operator << ( const std::string &value );
@@ -229,6 +233,7 @@ namespace JsonTest {
 #define JSONTEST_ASSERT_STRING_EQUAL( expected, actual ) \
    JsonTest::checkStringEqual( *result_,                 \
       std::string(expected), std::string(actual),        \
+      __FILE__, __LINE__,                                \
       #expected " == " #actual )
 
 /// \brief Begin a fixture test case.