Index: src/OFLHAArchive.m
==================================================================
--- src/OFLHAArchive.m
+++ src/OFLHAArchive.m
@@ -324,11 +324,12 @@
 			_decompressedStream = [[OFLHADecompressingStream alloc]
 			    of_initWithStream: stream
 				 distanceBits: 5
 			       dictionaryBits: 20];
 		else if ([compressionMethod isEqual: @"-lh0-"] ||
-		    [compressionMethod isEqual: @"-lhd-"])
+		    [compressionMethod isEqual: @"-lhd-"] ||
+		    [compressionMethod isEqual: @"-lz4-"])
 			_decompressedStream = [stream retain];
 		else
 			@throw [OFUnsupportedVersionException
 			    exceptionWithVersion: compressionMethod];
 

Index: utils/ofarc/OFArc.m
==================================================================
--- utils/ofarc/OFArc.m
+++ utils/ofarc/OFArc.m
@@ -560,11 +560,12 @@
 		if ([path hasSuffix: @".tar.gz"] || [path hasSuffix: @".tgz"] ||
 		    [path hasSuffix: @".TAR.GZ"] || [path hasSuffix: @".TGZ"])
 			type = @"tgz";
 		else if ([path hasSuffix: @".gz"] || [path hasSuffix: @".GZ"])
 			type = @"gz";
-		else if ([path hasSuffix: @".lha"] || [path hasSuffix: @".lzh"])
+		else if ([path hasSuffix: @".lha"] ||
+		    [path hasSuffix: @".lzh"] || [path hasSuffix: @".lzs"])
 			type = @"lha";
 		else if ([path hasSuffix: @".tar"] || [path hasSuffix: @".TAR"])
 			type = @"tar";
 		else
 			type = @"zip";