diff --git a/src/serialization/string_utils.cpp b/src/serialization/string_utils.cpp
index ae33ab7c5cc9..20d2dbbf9d79 100644
--- a/src/serialization/string_utils.cpp
+++ b/src/serialization/string_utils.cpp
@@ -1065,8 +1065,7 @@ utf8_string lowercase(const utf8_string& s)
 		for(;itor != utf8_iterator::end(s); ++itor) {
 			ucs4char uchar = *itor;
 			// If wchar_t is less than 32 bits wide, we cannot apply towlower() to all codepoints
-			if(uchar <= static_cast<ucs4char>(std::numeric_limits<wchar_t>::max()) &&
-			   uchar >= static_cast<ucs4char>(std::numeric_limits<wchar_t>::min()))
+			if(uchar <= static_cast<ucs4char>(std::numeric_limits<wchar_t>::max()))
 				uchar = towlower(static_cast<wchar_t>(uchar));
 			res += utils::ucs4char_to_string(uchar);
 		}
diff --git a/src/tests/test_util.cpp b/src/tests/test_util.cpp
index f03130877c74..cba6baea732b 100644
--- a/src/tests/test_util.cpp
+++ b/src/tests/test_util.cpp
@@ -16,6 +16,7 @@
 
 #include <boost/test/unit_test.hpp>
 
+#include "serialization/string_utils.hpp"
 #include "util.hpp"
 
 BOOST_AUTO_TEST_SUITE( util )
@@ -74,6 +75,11 @@ BOOST_AUTO_TEST_CASE( test_lexical_cast_default )
 	BOOST_CHECK( result6 >= 0.499 && result6 <= 0.511 );
 }
 
+BOOST_AUTO_TEST_CASE( test_lowercase )
+{
+	BOOST_CHECK_EQUAL ( utils::lowercase("FOO") , "foo" );
+}
+
 /* vim: set ts=4 sw=4: */
 
 BOOST_AUTO_TEST_SUITE_END()