diff --git a/tests/fuzz/zstd_helpers.c b/tests/fuzz/zstd_helpers.c
index c9fcdd5bf..43a26405f 100644
--- a/tests/fuzz/zstd_helpers.c
+++ b/tests/fuzz/zstd_helpers.c
@@ -135,7 +135,7 @@ void FUZZ_setRandomParameters(ZSTD_CCtx *cctx, size_t srcSize, FUZZ_dataProducer
       setRand(cctx, ZSTD_c_targetCBlockSize, ZSTD_TARGETCBLOCKSIZE_MIN, ZSTD_TARGETCBLOCKSIZE_MAX, producer);
     }
 
-    if (FUZZ_dataProducer_uint32Range(producer, 0, 10) == 0) {
+    if (FUZZ_dataProducer_uint32Range(producer, 0, 10) == 1) {
         setExternalMatchFinderParams(cctx, producer);
     } else {
         ZSTD_registerExternalMatchFinder(cctx, NULL, NULL);