diff --git a/.changeset/big-mails-look.md b/.changeset/big-mails-look.md
new file mode 100644
index 0000000..1bb36fd
--- /dev/null
+++ b/.changeset/big-mails-look.md
@@ -0,0 +1,5 @@
+---
+"@connectk12/exceljs": patch
+---
+
+Resolve issue with findLastRowInRecordSet
diff --git a/src/data.ts b/src/data.ts
index 368d901..d8a6126 100644
--- a/src/data.ts
+++ b/src/data.ts
@@ -386,7 +386,7 @@ export const findLastRowInRecordSet = ({
   });
   const lastRowInRecordSet = nextMatchingRow
     ? worksheet.getRow(nextMatchingRow.number - 1)
-    : undefined;
+    : worksheet.getRow(lastRowNumber);
   return lastRowInRecordSet;
 };