@@ -391,10 +391,19 @@
 {
 	[self finishInitialization];
 
 	return [self stringByAppendingString: string];
 }
+
+- (OFString*)stringByAppendingFormat: (OFConstantString*)format
+			   arguments: (va_list)arguments
+{
+	[self finishInitialization];
+
+	return [self stringByAppendingFormat: format
+				   arguments: arguments];
+}
 
 - (OFString*)stringByAppendingPathComponent: (OFString*)component
 {
 	[self finishInitialization];