@@ -904,11 +904,16 @@
 				toIndex: range.start + range.length];
 }
 
 - (OFString*)stringByAppendingString: (OFString*)str
 {
-	return [[OFMutableString stringWithString: self] appendString: str];
+	OFMutableString *new;
+
+	new = [OFMutableString stringWithString: self];
+	[new appendString: str];
+
+	return new;
 }
 
 - (BOOL)hasPrefix: (OFString*)prefix
 {
 	size_t len = [prefix cStringLength];