diff --git a/include/boost/parser/parser.hpp b/include/boost/parser/parser.hpp
index 1c5585f3..08cce2b3 100644
--- a/include/boost/parser/parser.hpp
+++ b/include/boost/parser/parser.hpp
@@ -4587,7 +4587,13 @@ namespace boost { namespace parser {
                          !std::is_same_v<just_x, just_out>) &&
                         std::is_assignable_v<just_out &, just_x &&> &&
                         (!std::is_same_v<just_out, std::string> ||
-                         !std::is_integral_v<just_x>)) {
+                         !std::is_integral_v<just_x>) &&
+                        (!std::is_integral_v<just_x> ||
+                         (!std::is_same_v<just_out, std::u32string>
+#if defined(__cpp_char8_t)
+                          && !std::is_same_v<just_out, std::u8string>
+#endif
+                         ))) {
                         detail::assign(out, std::move(x));
                     } else {
                         detail::move_back(
diff --git a/test/github_issues.cpp b/test/github_issues.cpp
index 03dd3099..c9c11619 100644
--- a/test/github_issues.cpp
+++ b/test/github_issues.cpp
@@ -777,6 +777,48 @@ void github_issue_312()
     BOOST_TEST(result.value()->evaluate() == ((2*0.1) + 33.) * (2 + 3) + 3.1415 * 2);
 }
 
+void github_issue_327()
+{
+    namespace bp = boost::parser;
+    auto const chars = bp::char_ >> bp::char_;
+
+    {
+        std::u32string result;
+        bool const success = bp::parse(std::u32string{U"ab"}, chars, result);
+        BOOST_TEST(success);
+        BOOST_TEST(result == U"ab");
+    }
+    {
+        std::u32string result;
+        bool const success = bp::parse(std::string{"ab"}, chars, result);
+        BOOST_TEST(success);
+        BOOST_TEST(result == U"ab");
+    }
+    {
+        std::u32string const input{U"\u00e9\U0001F600"};
+        std::u32string result;
+        bool const success = bp::parse(input, chars, result);
+        BOOST_TEST(success);
+        BOOST_TEST(result == input);
+    }
+    {
+        std::u32string const input{U"\u00e9\U0001F600"};
+        std::string result;
+        bool const success = bp::parse(input, chars, result);
+        BOOST_TEST(success);
+        BOOST_TEST(result == "\xC3\xA9\xF0\x9F\x98\x80");
+    }
+#if defined(__cpp_char8_t)
+    {
+        std::u32string const input{U"\u00e9\U0001F600"};
+        std::u8string result;
+        bool const success = bp::parse(input, chars, result);
+        BOOST_TEST(success);
+        BOOST_TEST(result == u8"\u00e9\U0001F600");
+    }
+#endif
+}
+
 
 int main()
 {
@@ -796,5 +838,6 @@ int main()
     github_issue_294();
     github_pr_297();
     github_issue_312();
+    github_issue_327();
     return boost::report_errors();
 }