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-rw-r--r--lib/deprecated/zbuff_compress.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/lib/deprecated/zbuff_compress.c b/lib/deprecated/zbuff_compress.c
index 8adbaec260d57..f39c60d89f604 100644
--- a/lib/deprecated/zbuff_compress.c
+++ b/lib/deprecated/zbuff_compress.c
@@ -72,6 +72,7 @@ size_t ZBUFF_compressInit_advanced(ZBUFF_CCtx* zbc,
const void* dict, size_t dictSize,
ZSTD_parameters params, unsigned long long pledgedSrcSize)
{
+ if (pledgedSrcSize==0) pledgedSrcSize = ZSTD_CONTENTSIZE_UNKNOWN; /* preserve "0 == unknown" behavior */
return ZSTD_initCStream_advanced(zbc, dict, dictSize, params, pledgedSrcSize);
}