@@ -27,10 +27,16 @@
 @implementation OFMutableZIPArchiveEntry
 @dynamic fileName, fileComment, extraField, versionMadeBy, minVersionNeeded;
 @dynamic modificationDate, compressionMethod, compressedSize, uncompressedSize;
 @dynamic CRC32, versionSpecificAttributes, generalPurposeBitFlag;
 @dynamic of_localFileHeaderOffset;
+/*
+ * The following are optional in OFMutableArchiveEntry, but Apple GCC 4.0.1 is
+ * buggy and needs this to stop complaining.
+ */
+@dynamic POSIXPermissions, ownerAccountID, groupOwnerAccountID;
+@dynamic ownerAccountName, groupOwnerAccountName;
 
 + (instancetype)entryWithFileName: (OFString *)fileName
 {
 	return [[[self alloc] initWithFileName: fileName] autorelease];
 }