diff --git a/cppu/qa/cppumaker/test_cppumaker.cxx b/cppu/qa/cppumaker/test_cppumaker.cxx
index f29c5eaab96f..8dfe84aa89d7 100644
--- a/cppu/qa/cppumaker/test_cppumaker.cxx
+++ b/cppu/qa/cppumaker/test_cppumaker.cxx
@@ -532,9 +532,6 @@ void Test::testConstants() {
         SAL_MIN_INT8, test::codemaker::cppumaker::Constants::byteMin);
     CPPUNIT_ASSERT_EQUAL(
         SAL_MAX_INT8, test::codemaker::cppumaker::Constants::byteMax);
-    CPPUNIT_ASSERT_EQUAL(
-        static_cast< sal_Int8 >(-1),
-        test::codemaker::cppumaker::Constants::byteNeg);
     CPPUNIT_ASSERT_EQUAL(
         SAL_MIN_INT16, test::codemaker::cppumaker::Constants::shortMin);
     CPPUNIT_ASSERT_EQUAL(
diff --git a/cppu/qa/cppumaker/types.idl b/cppu/qa/cppumaker/types.idl
index 2c0a0559af7a..f22d52fc58f0 100644
--- a/cppu/qa/cppumaker/types.idl
+++ b/cppu/qa/cppumaker/types.idl
@@ -690,7 +690,6 @@ exception TestException2: TestException1 {};
 constants Constants {
     const byte byteMin = -128;
     const byte byteMax = 127;
-    const byte byteNeg = 255;
     const short shortMin = -32768;
     const short shortMax = 32767;
     const unsigned short unsignedShortMin = 0;