Index: src/OFLHAArchive.m
==================================================================
--- src/OFLHAArchive.m
+++ src/OFLHAArchive.m
@@ -35,10 +35,11 @@
 #import "OFInvalidArgumentException.h"
 #import "OFNotImplementedException.h"
 #import "OFNotOpenException.h"
 #import "OFOutOfRangeException.h"
 #import "OFTruncatedDataException.h"
+#import "OFUnsupportedVersionException.h"
 #import "OFWriteFailedException.h"
 
 enum {
 	modeRead,
 	modeWrite,
@@ -317,12 +318,15 @@
 		else if ([compressionMethod isEqual: @"-lh7-"])
 			_decompressedStream = [[OFLHADecompressingStream alloc]
 			    of_initWithStream: stream
 				 distanceBits: 5
 			       dictionaryBits: 17];
-		else
+		else if ([compressionMethod isEqual: @"-lh0-"])
 			_decompressedStream = [stream retain];
+		else
+			@throw [OFUnsupportedVersionException
+			    exceptionWithVersion: compressionMethod];
 
 		_entry = [entry copy];
 		_toRead = entry.uncompressedSize;
 	} @catch (id e) {
 		[self release];
@@ -332,11 +336,11 @@
 	return self;
 }
 
 - (void)dealloc
 {
-	if (_stream != nil || _decompressedStream != nil)
+	if (_stream != nil && _decompressedStream != nil)
 		[self close];
 
 	[_entry release];
 
 	if (_archive->_lastReturnedStream == self)