diff --git a/src/display/api.js b/src/display/api.js
index a90e8bcd6..b960a16d3 100644
--- a/src/display/api.js
+++ b/src/display/api.js
@@ -233,8 +233,7 @@ if (typeof PDFJSDev === "undefined" || !PDFJSDev.test("PRODUCTION")) {
  */
 
 /**
- * @typedef { string | URL | TypedArray | ArrayBuffer |
- *            PDFDataRangeTransport | DocumentInitParameters
+ * @typedef { string | URL | TypedArray | ArrayBuffer | DocumentInitParameters
  * } GetDocumentParameters
  */
 
@@ -258,7 +257,14 @@ function getDocument(src) {
     source = { url: src };
   } else if (isArrayBuffer(src)) {
     source = { data: src };
-  } else if (src instanceof PDFDataRangeTransport) {
+  } else if (
+    (typeof PDFJSDev === "undefined" || PDFJSDev.test("GENERIC")) &&
+    src instanceof PDFDataRangeTransport
+  ) {
+    deprecated(
+      "`PDFDataRangeTransport`-instance, " +
+        "please use a parameter object with `range`-property instead."
+    );
     source = { range: src };
   } else {
     if (typeof src !== "object") {
diff --git a/test/unit/api_spec.js b/test/unit/api_spec.js
index 0d373d18f..a6063a364 100644
--- a/test/unit/api_spec.js
+++ b/test/unit/api_spec.js
@@ -3265,7 +3265,7 @@ Caron Broadcasting, Inc., an Ohio corporation (“Lessee”).`)
         });
       };
 
-      const loadingTask = getDocument(transport);
+      const loadingTask = getDocument({ range: transport });
       const pdfDocument = await loadingTask.promise;
       expect(pdfDocument.numPages).toEqual(14);
 
@@ -3310,7 +3310,7 @@ Caron Broadcasting, Inc., an Ohio corporation (“Lessee”).`)
         });
       };
 
-      const loadingTask = getDocument(transport);
+      const loadingTask = getDocument({ range: transport });
       const pdfDocument = await loadingTask.promise;
       expect(pdfDocument.numPages).toEqual(14);