diff --git a/src/core/xref.js b/src/core/xref.js
index 4a02f5ed8..da7491075 100644
--- a/src/core/xref.js
+++ b/src/core/xref.js
@@ -961,6 +961,15 @@ class XRef {
         );
       }
       nums[i] = num;
+
+      // The entry in the xref table is the object number followed by the index.
+      // So if index (gen number) is not the same as the index (i), we fix it
+      // (fixes bug 1978317).
+      const entry = this.getEntry(num);
+      if (entry?.offset === tableOffset && entry.gen !== i) {
+        entry.gen = i;
+      }
+
       offsets[i] = offset;
     }
 
diff --git a/test/pdfs/.gitignore b/test/pdfs/.gitignore
index 2337dbcaf..3e8a6d274 100644
--- a/test/pdfs/.gitignore
+++ b/test/pdfs/.gitignore
@@ -735,3 +735,4 @@
 !issue20102.pdf
 !issue20065.pdf
 !bug1708041.pdf
+!bug1978317.pdf
diff --git a/test/pdfs/bug1978317.pdf b/test/pdfs/bug1978317.pdf
new file mode 100755
index 000000000..d38d055f2
Binary files /dev/null and b/test/pdfs/bug1978317.pdf differ
diff --git a/test/test_manifest.json b/test/test_manifest.json
index 33c925e43..2e28f992f 100644
--- a/test/test_manifest.json
+++ b/test/test_manifest.json
@@ -12221,5 +12221,12 @@
     "rounds": 1,
     "disableFontFace": true,
     "type": "eq"
+  },
+  {
+    "id": "bug1978317",
+    "file": "pdfs/bug1978317.pdf",
+    "md5": "ae4f643ee9bb0fd725277a9d1e0fb1df",
+    "rounds": 1,
+    "type": "load"
   }
 ]