diff --git a/src/core/xref.js b/src/core/xref.js
index 669af0ed8..4a02f5ed8 100644
--- a/src/core/xref.js
+++ b/src/core/xref.js
@@ -842,7 +842,6 @@ class XRef {
 
     if (xrefEntry === null) {
       // The referenced entry can be free.
-      this._cacheMap.set(num, xrefEntry);
       return xrefEntry;
     }
     // Prevent circular references, in corrupt PDF documents, from hanging the
diff --git a/test/pdfs/issue19510.pdf.link b/test/pdfs/issue19510.pdf.link
new file mode 100644
index 000000000..91015fdd2
--- /dev/null
+++ b/test/pdfs/issue19510.pdf.link
@@ -0,0 +1 @@
+https://github.com/user-attachments/files/18841919/geht_nicht_02.pdf
diff --git a/test/test_manifest.json b/test/test_manifest.json
index d4deda407..6549e49e1 100644
--- a/test/test_manifest.json
+++ b/test/test_manifest.json
@@ -5626,6 +5626,14 @@
     "type": "eq",
     "lastPage": 1
   },
+  {
+    "id": "issue19510",
+    "file": "pdfs/issue19510.pdf",
+    "md5": "3ff133f633cea3e2f13f08f8c3414cc6",
+    "link": true,
+    "rounds": 1,
+    "type": "eq"
+  },
   {
     "id": "issue11768",
     "file": "pdfs/issue11768_reduced.pdf",