diff --git a/lib/compress/zstd_compress.c b/lib/compress/zstd_compress.c
index 9d9cb394..29dc0b77 100644
--- a/lib/compress/zstd_compress.c
+++ b/lib/compress/zstd_compress.c
@@ -392,12 +392,12 @@ size_t ZSTD_copyCCtx_internal(ZSTD_CCtx* dstCCtx, const ZSTD_CCtx* srcCCtx,
 
     /* copy entropy tables */
     dstCCtx->flagStaticTables = srcCCtx->flagStaticTables;
-    dstCCtx->flagStaticHufTable = srcCCtx->flagStaticHufTable;
     if (srcCCtx->flagStaticTables) {
         memcpy(dstCCtx->litlengthCTable, srcCCtx->litlengthCTable, sizeof(dstCCtx->litlengthCTable));
         memcpy(dstCCtx->matchlengthCTable, srcCCtx->matchlengthCTable, sizeof(dstCCtx->matchlengthCTable));
         memcpy(dstCCtx->offcodeCTable, srcCCtx->offcodeCTable, sizeof(dstCCtx->offcodeCTable));
     }
+    dstCCtx->flagStaticHufTable = srcCCtx->flagStaticHufTable;
     if (srcCCtx->flagStaticHufTable) {
         memcpy(dstCCtx->hufTable, srcCCtx->hufTable, HUF_CTABLE_SIZE(255));
     }
diff --git a/lib/compress/zstdmt_compress.c b/lib/compress/zstdmt_compress.c
index 50c98ae9..04a44898 100644
--- a/lib/compress/zstdmt_compress.c
+++ b/lib/compress/zstdmt_compress.c
@@ -231,7 +231,7 @@ void ZSTDMT_compressChunk(void* jobDescription)
     DEBUGLOG(3, "job (first:%u) (last:%u) : dictSize %u, srcSize %u",
                  job->firstChunk, job->lastChunk, (U32)job->dictSize, (U32)job->srcSize);
     if (job->cdict) {  /* should only happen for first segment */
-        size_t const initError = ZSTD_compressBegin_usingCDict(job->cctx, job->cdict, job->fullFrameSize);
+        size_t const initError = ZSTD_compressBegin_usingCDict_advanced(job->cctx, job->cdict, job->params.fParams, job->fullFrameSize);
         if (job->cdict) DEBUGLOG(3, "using CDict ");
         if (ZSTD_isError(initError)) { job->cSize = initError; goto _endJob; }
     } else {  /* srcStart points at reloaded section */
diff --git a/tests/zstreamtest.c b/tests/zstreamtest.c
index 6673208b..4048a7df 100644
--- a/tests/zstreamtest.c
+++ b/tests/zstreamtest.c
@@ -131,7 +131,7 @@ static buffer_t FUZ_createDictionary(const void* src, size_t srcSize, size_t blo
     }
     {   size_t const dictSize = ZDICT_trainFromBuffer(dict.start, requestedDictSize, src, blockSizes, (unsigned)nbBlocks);
         free(blockSizes);
-        if (ZDICT_isError(dictSize)) { free(dict.start); return (buffer_t){ NULL, 0, 0 }; }
+        if (ZDICT_isError(dictSize)) { free(dict.start); return g_nullBuffer; }
         dict.size = requestedDictSize;
         dict.filled = dictSize;
         return dict;   /* how to return dictSize ? */
@@ -972,6 +972,7 @@ static int fuzzerTests_MT(U32 seed, U32 nbTests, unsigned startTest, double comp
                 params.fParams.checksumFlag = FUZ_rand(&lseed) & 1;
                 params.fParams.noDictIDFlag = FUZ_rand(&lseed) & 1;
                 params.fParams.contentSizeFlag = pledgedSrcSize>0;
+                DISPLAYLEVEL(5, "checksumFlag : %u \n", params.fParams.checksumFlag);
                 { size_t const initError = ZSTDMT_initCStream_advanced(zc, dict, dictSize, params, pledgedSrcSize);
                   CHECK (ZSTD_isError(initError),"ZSTDMT_initCStream_advanced error : %s", ZSTD_getErrorName(initError)); }
                 ZSTDMT_setMTCtxParameter(zc, ZSTDMT_p_overlapSectionLog, FUZ_rand(&lseed) % 12);
@@ -1023,9 +1024,9 @@ static int fuzzerTests_MT(U32 seed, U32 nbTests, unsigned startTest, double comp
                     CHECK (ZSTD_isError(remainingToFlush), "ZSTDMT_endStream error : %s", ZSTD_getErrorName(remainingToFlush));
                     DISPLAYLEVEL(5, "endStream : remainingToFlush : %u \n", (U32)remainingToFlush);
             }   }
-            DISPLAYLEVEL(5, "Frame completed \n");
             crcOrig = XXH64_digest(&xxhState);
             cSize = outBuff.pos;
+            DISPLAYLEVEL(5, "Frame completed : %u bytes \n", (U32)cSize);
         }
 
         /* multi - fragments decompression test */
@@ -1046,6 +1047,7 @@ static int fuzzerTests_MT(U32 seed, U32 nbTests, unsigned startTest, double comp
                 DISPLAYLEVEL(5, "ZSTD_decompressStream input %u bytes \n", (U32)readCSrcSize);
                 decompressionResult = ZSTD_decompressStream(zd, &outBuff, &inBuff);
                 CHECK (ZSTD_isError(decompressionResult), "decompression error : %s", ZSTD_getErrorName(decompressionResult));
+                DISPLAYLEVEL(5, "inBuff.pos = %u \n", (U32)readCSrcSize);
             }
             CHECK (outBuff.pos != totalTestSize, "decompressed data : wrong size (%u != %u)", (U32)outBuff.pos, (U32)totalTestSize);
             CHECK (inBuff.pos != cSize, "compressed data should be fully read (%u != %u)", (U32)inBuff.pos, (U32)cSize);