@@ -1,7 +1,7 @@
 /*
- * Copyright (c) 2008-2021 Jonathan Schleifer <js@nil.im>
+ * Copyright (c) 2008-2022 Jonathan Schleifer <js@nil.im>
  *
  * All rights reserved.
  *
  * This file is part of ObjFW. It may be distributed under the terms of the
  * Q Public License 1.0, which can be found in the file LICENSE.QPL included in
@@ -12,12 +12,12 @@
  * LICENSE.GPLv2 or LICENSE.GPLv3 respectively included in the packaging of this
  * file.
  */
 
 /*
- * This file is also used for MS-DOS! Don't forget to #ifdef Windows-specific
- * parts!
+ * This file is also used for MS-DOS and MiNT! Don't forget to #ifdef
+ * Windows-specific parts!
  */
 
 #include "config.h"
 
 #import "OFString+PathAdditions.h"
@@ -316,10 +316,31 @@
 		[ret makeImmutable];
 
 		return ret;
 	}
 }
+
+- (OFString *)stringByAppendingPathExtension: (OFString *)extension
+{
+	if ([self hasSuffix: @"\\"] || [self hasSuffix: @"/"]) {
+		void *pool = objc_autoreleasePoolPush();
+		OFMutableArray *components;
+		OFString *fileName, *ret;
+
+		components =
+		    [[self.pathComponents mutableCopy] autorelease];
+		fileName = [components.lastObject
+		    stringByAppendingFormat: @".%@", extension];
+		[components replaceObjectAtIndex: components.count - 1
+				      withObject: fileName];
+
+		ret = [[OFString pathWithComponents: components] retain];
+		objc_autoreleasePoolPop(pool);
+		return [ret autorelease];
+	} else
+		return [self stringByAppendingFormat: @".%@", extension];
+}
 
 - (bool)of_isDirectoryPath
 {
 	return ([self hasSuffix: @"\\"] || [self hasSuffix: @"/"] ||
 	    [OFFileURLHandler of_directoryExistsAtPath: self]);