@@ -105,10 +105,12 @@
     size_t, bool);
 extern bool of_unicode_to_mac_roman(const of_unichar_t*, unsigned char*,
     size_t, bool);
 extern bool of_unicode_to_koi8_r(const of_unichar_t*, unsigned char*,
     size_t, bool);
+extern bool of_unicode_to_koi8_u(const of_unichar_t*, unsigned char*,
+    size_t, bool);
 
 /* References for static linking */
 void
 _references_to_categories_of_OFString(void)
 {
@@ -166,10 +168,12 @@
 		encoding = OF_STRING_ENCODING_CODEPAGE_858;
 	else if ([string isEqual: @"macintosh"] || [string isEqual: @"mac"])
 		encoding = OF_STRING_ENCODING_MAC_ROMAN;
 	else if ([string isEqual: @"koi8-r"])
 		encoding = OF_STRING_ENCODING_KOI8_R;
+	else if ([string isEqual: @"koi8-u"])
+		encoding = OF_STRING_ENCODING_KOI8_U;
 	else
 		@throw [OFInvalidEncodingException exception];
 
 	objc_autoreleasePoolPop(pool);
 
@@ -1234,10 +1238,23 @@
 
 		cString[length] = '\0';
 
 		return length;
 #endif
+#ifdef HAVE_KOI8_U
+	case OF_STRING_ENCODING_KOI8_U:
+		if (length + 1 > maxLength)
+			@throw [OFOutOfRangeException exception];
+
+		if (!of_unicode_to_koi8_u(characters,
+		    (unsigned char*)cString, length, lossy))
+			@throw [OFInvalidEncodingException exception];
+
+		cString[length] = '\0';
+
+		return length;
+#endif
 	default:
 		@throw [OFNotImplementedException exceptionWithSelector: _cmd
 								 object: self];
 	}
 }
@@ -1297,10 +1314,11 @@
 	case OF_STRING_ENCODING_CODEPAGE_437:
 	case OF_STRING_ENCODING_CODEPAGE_850:
 	case OF_STRING_ENCODING_CODEPAGE_858:
 	case OF_STRING_ENCODING_MAC_ROMAN:
 	case OF_STRING_ENCODING_KOI8_R:
+	case OF_STRING_ENCODING_KOI8_U:
 		cString = [object allocMemoryWithSize: length + 1];
 
 		[self OF_getCString: cString
 			  maxLength: length + 1
 			   encoding: encoding
@@ -1367,10 +1385,11 @@
 	case OF_STRING_ENCODING_CODEPAGE_437:
 	case OF_STRING_ENCODING_CODEPAGE_850:
 	case OF_STRING_ENCODING_CODEPAGE_858:
 	case OF_STRING_ENCODING_MAC_ROMAN:
 	case OF_STRING_ENCODING_KOI8_R:
+	case OF_STRING_ENCODING_KOI8_U:
 		return [self length];
 	default:
 		@throw [OFInvalidEncodingException exception];
 	}
 }