diff --git a/javaunohelper/source/bootstrap.cxx b/javaunohelper/source/bootstrap.cxx
index ac3b59603604..e245ecc174e6 100644
--- a/javaunohelper/source/bootstrap.cxx
+++ b/javaunohelper/source/bootstrap.cxx
@@ -53,7 +53,7 @@ inline OUString jstring_to_oustring( jstring jstr, JNIEnv * jni_env )
     jsize len = jni_env->GetStringLength( jstr );
     rtl_uString * ustr =
         static_cast<rtl_uString *>(rtl_allocateMemory( sizeof (rtl_uString) + (len * sizeof (sal_Unicode)) ));
-    jni_env->GetStringRegion( jstr, 0, len, ustr->buffer );
+    jni_env->GetStringRegion( jstr, 0, len, reinterpret_cast<jchar *>(ustr->buffer) );
     OSL_ASSERT( !jni_env->ExceptionCheck() );
     ustr->refCount = 1;
     ustr->length = len;
diff --git a/javaunohelper/source/javaunohelper.cxx b/javaunohelper/source/javaunohelper.cxx
index 83c9643c3d4d..d18979b7381d 100644
--- a/javaunohelper/source/javaunohelper.cxx
+++ b/javaunohelper/source/javaunohelper.cxx
@@ -56,7 +56,7 @@ jboolean Java_com_sun_star_comp_helper_SharedLibraryLoader_component_1writeInfo(
     bool bRet = false;
 
     const jchar* pJLibName = pJEnv->GetStringChars(jLibName, nullptr);
-    OUString aLibName(pJLibName);
+    OUString aLibName(reinterpret_cast<sal_Unicode const *>(pJLibName));
     pJEnv->ReleaseStringChars(jLibName, pJLibName);
 
 #ifdef DISABLE_DYNLOADING
@@ -138,7 +138,7 @@ jobject Java_com_sun_star_comp_helper_SharedLibraryLoader_component_1getFactory(
     jobject jSMgr, jobject jRegKey, jobject loader )
 {
     const jchar* pJLibName = pJEnv->GetStringChars(jLibName, nullptr);
-    OUString aLibName(pJLibName);
+    OUString aLibName(reinterpret_cast<sal_Unicode const *>(pJLibName));
     pJEnv->ReleaseStringChars(jLibName, pJLibName);
 
 #ifdef DISABLE_DYNLOADING