diff --git a/uppsrc/Core/FilterStream.cpp b/uppsrc/Core/FilterStream.cpp
index 14281da70..423e35ed5 100644
--- a/uppsrc/Core/FilterStream.cpp
+++ b/uppsrc/Core/FilterStream.cpp
@@ -10,13 +10,13 @@ InFilterStream::InFilterStream()
 void InFilterStream::Init()
 {
 	static byte h[1];
-	ptr = rdlim = h;
 	pos = 0;
 	in = NULL;
 	eof = false;
 	style = STRM_READ|STRM_LOADING;
 	SetLoading();
 	buffer.Clear();
+	ptr = rdlim = Stream::buffer = NULL;
 }
 
 dword InFilterStream::Avail()