diff --git a/lib/compress/zstd_compress.c b/lib/compress/zstd_compress.c
index 9300357f..c17645de 100644
--- a/lib/compress/zstd_compress.c
+++ b/lib/compress/zstd_compress.c
@@ -377,7 +377,7 @@ size_t ZSTD_CCtx_setParameter(ZSTD_CCtx* cctx, ZSTD_cParameter param, unsigned v
                 return ERROR(compressionParameter_unsupported);
             ZSTDMT_freeCCtx(cctx->mtctx);
             cctx->nbThreads = 1;
-            cctx->mtctx = ZSTDMT_createCCtx(value);
+            cctx->mtctx = ZSTDMT_createCCtx_advanced(value, cctx->customMem);
             if (cctx->mtctx == NULL) return ERROR(memory_allocation);
         }
         cctx->nbThreads = value;
diff --git a/tests/Makefile b/tests/Makefile
index 345e0e8e..4784136e 100644
--- a/tests/Makefile
+++ b/tests/Makefile
@@ -79,7 +79,7 @@ all32: fullbench32 fuzzer32 zstreamtest32
 
 allnothread: fullbench fuzzer paramgrill datagen  decodecorpus
 
-dll: fuzzer-dll zstreamtest-dll 
+dll: fuzzer-dll zstreamtest-dll
 
 zstd:
 	$(MAKE) -C $(PRGDIR) $@
@@ -108,11 +108,11 @@ fullbench-dll: $(PRGDIR)/datagen.c fullbench.c
 	$(MAKE) -C $(ZSTDDIR) libzstd
 	$(CC) $(FLAGS) $^ -o $@$(EXT) -DZSTD_DLL_IMPORT=1 $(ZSTDDIR)/dll/libzstd.dll
 
-fuzzer   : $(ZSTD_FILES) $(ZDICT_FILES) $(PRGDIR)/datagen.c fuzzer.c
-	$(CC)      $(FLAGS) $^ -o $@$(EXT)
-
-fuzzer32 : $(ZSTD_FILES) $(ZDICT_FILES) $(PRGDIR)/datagen.c fuzzer.c
-	$(CC) -m32 $(FLAGS) $^ -o $@$(EXT)
+fuzzer : CPPFLAGS += $(MULTITHREAD_CPP)
+fuzzer : LDFLAGS += $(MULTITHREAD_LD)
+fuzzer32: CFLAGS += -m32
+fuzzer fuzzer32 : $(ZSTD_FILES) $(ZDICT_FILES) $(PRGDIR)/datagen.c fuzzer.c
+	$(CC) $(FLAGS) $^ -o $@$(EXT)
 
 fuzzer-dll : LDFLAGS+= -L$(ZSTDDIR) -lzstd
 fuzzer-dll : $(ZSTDDIR)/common/xxhash.c $(PRGDIR)/datagen.c fuzzer.c