diff --git a/packages/stream-transform/dist/cjs/sync.cjs b/packages/stream-transform/dist/cjs/sync.cjs
index 360c0e9b6..a495fd454 100644
--- a/packages/stream-transform/dist/cjs/sync.cjs
+++ b/packages/stream-transform/dist/cjs/sync.cjs
@@ -145,7 +145,7 @@ const transform = function () {
   }
   // Validate arguments
   let expected_handler_length = 1;
-  if (options.params) {
+  if (options.params !== undefined && options.params !== null) {
     expected_handler_length++;
   }
   if (handler.length > expected_handler_length) {
diff --git a/packages/stream-transform/dist/esm/sync.js b/packages/stream-transform/dist/esm/sync.js
index aeb8d90ab..886c81724 100644
--- a/packages/stream-transform/dist/esm/sync.js
+++ b/packages/stream-transform/dist/esm/sync.js
@@ -5263,7 +5263,7 @@ const transform = function () {
   }
   // Validate arguments
   let expected_handler_length = 1;
-  if (options.params) {
+  if (options.params !== undefined && options.params !== null) {
     expected_handler_length++;
   }
   if (handler.length > expected_handler_length) {
diff --git a/packages/stream-transform/dist/iife/sync.js b/packages/stream-transform/dist/iife/sync.js
index 60b8c7d94..6113387d8 100644
--- a/packages/stream-transform/dist/iife/sync.js
+++ b/packages/stream-transform/dist/iife/sync.js
@@ -5266,7 +5266,7 @@ var stream_transform_sync = (function (exports) {
     }
     // Validate arguments
     let expected_handler_length = 1;
-    if (options.params) {
+    if (options.params !== undefined && options.params !== null) {
       expected_handler_length++;
     }
     if (handler.length > expected_handler_length) {
diff --git a/packages/stream-transform/dist/umd/sync.js b/packages/stream-transform/dist/umd/sync.js
index 8eb2a88b5..d6cf8f07f 100644
--- a/packages/stream-transform/dist/umd/sync.js
+++ b/packages/stream-transform/dist/umd/sync.js
@@ -5269,7 +5269,7 @@
     }
     // Validate arguments
     let expected_handler_length = 1;
-    if (options.params) {
+    if (options.params !== undefined && options.params !== null) {
       expected_handler_length++;
     }
     if (handler.length > expected_handler_length) {
diff --git a/packages/stream-transform/lib/sync.js b/packages/stream-transform/lib/sync.js
index e09e75130..67b2cfc69 100644
--- a/packages/stream-transform/lib/sync.js
+++ b/packages/stream-transform/lib/sync.js
@@ -33,7 +33,7 @@ const transform = function () {
   }
   // Validate arguments
   let expected_handler_length = 1;
-  if (options.params) {
+  if (options.params !== undefined && options.params !== null) {
     expected_handler_length++;
   }
   if (handler.length > expected_handler_length) {
diff --git a/packages/stream-transform/test/option.params.js b/packages/stream-transform/test/option.params.js
index 17579d9af..4474cf75b 100644
--- a/packages/stream-transform/test/option.params.js
+++ b/packages/stream-transform/test/option.params.js
@@ -1,7 +1,36 @@
+import "should";
+import { transform as transformSync } from "../lib/sync.js";
 import { generate } from "csv-generate";
 import { transform } from "../lib/index.js";
 
 describe("option.params", function () {
+  describe("sync API", function () {
+    for (const params of [0, false, ""]) {
+      it(`honors falsy params ${JSON.stringify(params)}`, function () {
+        const data = transformSync(
+          ["record"],
+          { params },
+          function (record, value) {
+            return [record, value];
+          },
+        );
+        data.should.eql([["record", params]]);
+      });
+    }
+
+    for (const params of [undefined, null]) {
+      it(`rejects callback handlers with params ${params}`, function () {
+        (function () {
+          transformSync(["record"], { params }, function (record, callback) {
+            callback(null, record);
+          });
+        }).should.throw(
+          "Invalid Handler: only synchronous handlers are supported",
+        );
+      });
+    }
+  });
+
   it("sync", function (next) {
     const generator = generate({ length: 100, objectMode: true, seed: 1 });
     const transformer = generator.pipe(