diff --git a/cppu/qa/test_unotype.cxx b/cppu/qa/test_unotype.cxx
index 338c6f77103f..a0b63fa738fe 100644
--- a/cppu/qa/test_unotype.cxx
+++ b/cppu/qa/test_unotype.cxx
@@ -233,7 +233,8 @@ void Test::testUnoType() {
 }
 
 void Test::testGetTypeFavourUnsigned() {
-#if defined SAL_W32 && !defined __MINGW32__ // cf. sal/types.h sal_Unicode
+#if defined SAL_W32 && !defined __MINGW32__ && !defined __clang__
+        // cf. sal/types.h sal_Unicode
     CPPUNIT_ASSERT(typeid(sal_Unicode) == typeid(sal_uInt16));
 #else
     CPPUNIT_ASSERT(typeid(sal_Unicode) != typeid(sal_uInt16));
@@ -281,7 +282,8 @@ void Test::testGetTypeFavourUnsigned() {
     CPPUNIT_ASSERT_EQUAL(
         cppu::getTypeFavourUnsigned(static_cast<cppu::UnoCharType *>(nullptr)),
         cppu::UnoType<cppu::UnoCharType>::get());
-#if defined SAL_W32 && !defined __MINGW32__ // cf. sal/types.h sal_Unicode
+#if defined SAL_W32 && !defined __MINGW32__ && !defined __clang__
+        // cf. sal/types.h sal_Unicode
     CPPUNIT_ASSERT_EQUAL(
         cppu::getTypeFavourUnsigned(static_cast<sal_Unicode *>(nullptr)),
         cppu::UnoType<cppu::UnoUnsignedShortType>::get());
@@ -326,7 +328,8 @@ void Test::testGetTypeFavourUnsigned() {
         cppu::UnoType<
             cppu::UnoSequenceType<
                 cppu::UnoSequenceType<cppu::UnoUnsignedShortType>>>::get());
-#if defined SAL_W32 && !defined __MINGW32__ // cf. sal/types.h sal_Unicode
+#if defined SAL_W32 && !defined __MINGW32__ && !defined __clang__
+        // cf. sal/types.h sal_Unicode
     CPPUNIT_ASSERT_EQUAL(
         cppu::getTypeFavourUnsigned(
             static_cast<css::uno::Sequence<sal_Unicode> *>(nullptr)),
@@ -424,7 +427,8 @@ void Test::testGetTypeFavourUnsigned() {
 }
 
 void Test::testGetTypeFavourChar() {
-#if defined SAL_W32 && !defined __MINGW32__ // cf. sal/types.h sal_Unicode
+#if defined SAL_W32 && !defined __MINGW32__ && !defined __clang__
+        // cf. sal/types.h sal_Unicode
     CPPUNIT_ASSERT(typeid(sal_Unicode) == typeid(sal_uInt16));
 #else
     CPPUNIT_ASSERT(typeid(sal_Unicode) != typeid(sal_uInt16));
@@ -448,7 +452,8 @@ void Test::testGetTypeFavourChar() {
         cppu::getTypeFavourChar(
             static_cast<cppu::UnoUnsignedShortType *>(nullptr)),
         cppu::UnoType<cppu::UnoUnsignedShortType>::get());
-#if defined SAL_W32 && !defined __MINGW32__ // cf. sal/types.h sal_Unicode
+#if defined SAL_W32 && !defined __MINGW32__ && !defined __clang__
+        // cf. sal/types.h sal_Unicode
     CPPUNIT_ASSERT_EQUAL(
         cppu::getTypeFavourChar(static_cast<sal_uInt16 *>(nullptr)),
         cppu::UnoType<cppu::UnoCharType>::get());
@@ -496,7 +501,8 @@ void Test::testGetTypeFavourChar() {
                 cppu::UnoSequenceType<cppu::UnoUnsignedShortType> *>(nullptr)),
         cppu::UnoType<
             cppu::UnoSequenceType<cppu::UnoUnsignedShortType>>::get());
-#if defined SAL_W32 && !defined __MINGW32__ // cf. sal/types.h sal_Unicode
+#if defined SAL_W32 && !defined __MINGW32__ && !defined __clang__
+        // cf. sal/types.h sal_Unicode
     CPPUNIT_ASSERT_EQUAL(
         cppu::getTypeFavourChar(
             static_cast<css::uno::Sequence<sal_uInt16> *>(nullptr)),
@@ -517,7 +523,8 @@ void Test::testGetTypeFavourChar() {
         cppu::UnoType<
             cppu::UnoSequenceType<
                 cppu::UnoSequenceType<cppu::UnoUnsignedShortType>>>::get());
-#if defined SAL_W32 && !defined __MINGW32__ // cf. sal/types.h sal_Unicode
+#if defined SAL_W32 && !defined __MINGW32__ && !defined __clang__
+        // cf. sal/types.h sal_Unicode
     CPPUNIT_ASSERT_EQUAL(
         cppu::getTypeFavourChar(
             static_cast<
diff --git a/include/cppu/unotype.hxx b/include/cppu/unotype.hxx
index a59445043735..a4d75011163d 100644
--- a/include/cppu/unotype.hxx
+++ b/include/cppu/unotype.hxx
@@ -149,7 +149,8 @@ cppu_detail_getUnoType(
         ::typelib_TypeClass_UNSIGNED_SHORT);
 }
 
-#if LIBO_INTERNAL_ONLY && (!defined SAL_W32 || defined __MINGW32__)
+#if LIBO_INTERNAL_ONLY \
+    && (!defined SAL_W32 || defined __MINGW32__ || defined __clang__)
     // cf. sal/types.h sal_Unicode
 inline css::uno::Type const &
 cppu_detail_getUnoType(SAL_UNUSED_PARAMETER sal_uInt16 const *) {
@@ -194,7 +195,8 @@ cppu_detail_getUnoType(SAL_UNUSED_PARAMETER ::cppu::UnoCharType const *) {
     return ::cppu::detail::getTypeFromTypeClass(::typelib_TypeClass_CHAR);
 }
 
-#if LIBO_INTERNAL_ONLY && (!defined SAL_W32 || defined __MINGW32__)
+#if LIBO_INTERNAL_ONLY \
+    && (!defined SAL_W32 || defined __MINGW32__ || defined __clang__)
     // cf. sal/types.h sal_Unicode
 inline css::uno::Type const &
 cppu_detail_getUnoType(SAL_UNUSED_PARAMETER sal_Unicode const *) {
diff --git a/include/rtl/ustrbuf.hxx b/include/rtl/ustrbuf.hxx
index f8dda00538a0..1b1067977a38 100644
--- a/include/rtl/ustrbuf.hxx
+++ b/include/rtl/ustrbuf.hxx
@@ -638,7 +638,8 @@ public:
         return append( &c, 1 );
     }
 
-#if LIBO_INTERNAL_ONLY && (!defined SAL_W32 || defined __MINGW32__)
+#if LIBO_INTERNAL_ONLY && \
+    (!defined SAL_W32 || defined __MINGW32__ || defined __clang__)
         // cf. sal/types.h sal_Unicode
     void append(sal_uInt16) = delete;
 #endif