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-rw-r--r--generic/tclZlib.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/generic/tclZlib.c b/generic/tclZlib.c
index 09cddcc..16bed47 100644
--- a/generic/tclZlib.c
+++ b/generic/tclZlib.c
@@ -612,6 +612,7 @@ Tcl_ZlibStreamInit(
zshPtr->flags = 0;
zshPtr->gzHeaderPtr = gzHeaderPtr;
memset(&zshPtr->stream, 0, sizeof(z_stream));
+ zshPtr->stream.adler = 1;
/*
* No output buffer available yet