diff --git a/test/regress/main.cpp b/test/regress/main.cpp
index 85ece016..0fcd0921 100644
--- a/test/regress/main.cpp
+++ b/test/regress/main.cpp
@@ -20,6 +20,10 @@
 #include "test_locale.hpp"
 #include <stdarg.h>
 
+#ifdef BOOST_HAS_ICU
+#include <unicode/uloc.h>
+#endif
+
 #ifdef TEST_THREADS
 #include <list>
 #include <boost/thread.hpp>
@@ -82,6 +86,19 @@ void run_tests()
 
 int cpp_main(int /*argc*/, char * /*argv*/[])
 {
+#ifdef BOOST_HAS_ICU
+   //
+   // We need to set the default locale used by ICU, 
+   // otherwise some of our tests using equivalence classes fail.
+   //
+   UErrorCode err = U_ZERO_ERROR;
+   uloc_setDefault("en", &err);
+   if(err != U_ZERO_ERROR)
+   {
+      std::cerr << "Unable to set the default ICU locale to \"en\"." << std::endl;
+      return -1;
+   }
+#endif
 #ifdef TEST_THREADS
    try{
       get_array_data();  // initialises data.
diff --git a/test/regress/test_unicode.cpp b/test/regress/test_unicode.cpp
index f84aa3ab..eed5b456 100644
--- a/test/regress/test_unicode.cpp
+++ b/test/regress/test_unicode.cpp
@@ -75,8 +75,8 @@ void test_unicode()
    TEST_REGEX_CLASS_U(Non-Spacing Mark, 20EA);
    TEST_REGEX_CLASS_U(Mc, 1938);
    TEST_REGEX_CLASS_U(Spacing Combining Mark, 1938);
-   TEST_REGEX_CLASS_U(Me, 06DE);
-   TEST_REGEX_CLASS_U(Enclosing Mark, 06DE);
+   TEST_REGEX_CLASS_U(Me, 0488);
+   TEST_REGEX_CLASS_U(Enclosing Mark, 0488);
    TEST_REGEX_CLASS_U(N*, 0669);
    TEST_REGEX_CLASS_U(Number, 0669);
    TEST_REGEX_CLASS_U(Nd, 0669);