diff --git a/tests/fuzz/zstd_helpers.c b/tests/fuzz/zstd_helpers.c
index d5210627e..ef4f05774 100644
--- a/tests/fuzz/zstd_helpers.c
+++ b/tests/fuzz/zstd_helpers.c
@@ -89,12 +89,11 @@ void FUZZ_setRandomParameters(ZSTD_CCtx *cctx, size_t srcSize, FUZZ_dataProducer
     setRand(cctx, ZSTD_c_ldmHashRateLog, ZSTD_LDM_HASHRATELOG_MIN,
             ZSTD_LDM_HASHRATELOG_MAX, producer);
     /* Set misc parameters */
-#ifndef ZSTD_MULTITHREAD
-    setRand(cctx, ZSTD_c_nbWorkers, 0, 0, producer);
-    setRand(cctx, ZSTD_c_rsyncable, 0, 0, producer);
-#else
     setRand(cctx, ZSTD_c_nbWorkers, 0, 2, producer);
     setRand(cctx, ZSTD_c_rsyncable, 0, 1, producer);
+#ifndef ZSTD_MULTITHREAD
+    set(cctx, ZSTD_c_nbWorkers, 0);
+    set(cctx, ZSTD_c_rsyncable, 0);
 #endif
     setRand(cctx, ZSTD_c_useRowMatchFinder, 0, 2, producer);
     setRand(cctx, ZSTD_c_enableDedicatedDictSearch, 0, 1, producer);