@@ -63,11 +63,12 @@
 	return self;
 }
 
 - (void)dealloc
 {
-	[self close];
+	if (_stream != nil)
+		[self close];
 
 	[_inflateStream release];
 	[_modificationDate release];
 
 	[super dealloc];
@@ -321,11 +322,14 @@
 	return (super.hasDataInReadBuffer || _stream.hasDataInReadBuffer);
 }
 
 - (void)close
 {
+	if (_stream == nil)
+		@throw [OFNotOpenException exceptionWithObject: self];
+
 	[_stream release];
 	_stream = nil;
 
 	[super close];
 }
 @end