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-rw-r--r--generic/tclZlib.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/generic/tclZlib.c b/generic/tclZlib.c
index 440bb9a..c9bc77f 100644
--- a/generic/tclZlib.c
+++ b/generic/tclZlib.c
@@ -1154,7 +1154,7 @@ Tcl_ZlibStreamSetCompressionDictionary(
ZlibStreamHandle *zshPtr = (ZlibStreamHandle *) zshandle;
if (compressionDictionaryObj && (NULL == TclGetBytesFromObj(NULL,
- compressionDictionaryObj, NULL))) {
+ compressionDictionaryObj, (int *)NULL))) {
/* Missing or invalid compression dictionary */
compressionDictionaryObj = NULL;
}