diff --git a/apps/sequence/sequence_store.cpp b/apps/sequence/sequence_store.cpp
index ffcd0d0f0..4c1e37382 100644
--- a/apps/sequence/sequence_store.cpp
+++ b/apps/sequence/sequence_store.cpp
@@ -1,22 +1,25 @@
 #include "sequence_store.h"
+#include <ion/storage.h>
 extern "C" {
 #include <assert.h>
 #include <stddef.h>
 }
-#include <ion.h>
 
 namespace Sequence {
 
 constexpr const char * SequenceStore::k_sequenceNames[MaxNumberOfSequences];
 
 uint32_t SequenceStore::storeChecksum() {
-  size_t dataLengthInBytes = MaxNumberOfSequences*sizeof(uint32_t);
-  assert((dataLengthInBytes & 0x3) == 0); // Assert that dataLengthInBytes is a multiple of 4
+  assert((MaxNumberOfSequences*sizeof(uint32_t) & 0x3) == 0); // Assert that dataLengthInBytes is a multiple of 4
   uint32_t checksums[MaxNumberOfSequences];
   for (int i = 0; i < MaxNumberOfSequences; i++) {
     checksums[i] = m_sequences[i].checksum();
   }
-  return Ion::crc32((uint32_t *)checksums, dataLengthInBytes/sizeof(uint32_t));
+  constexpr int checksumsStoreStorageSize = 2;
+  uint32_t checksumsStoreStorage[checksumsStoreStorageSize];
+  checksumsStoreStorage[0] = Ion::crc32((uint32_t *)checksums, MaxNumberOfSequences);
+  checksumsStoreStorage[1] = Ion::Storage::sharedStorage()->checksum();
+  return Ion::crc32((uint32_t *)checksumsStoreStorage, checksumsStoreStorageSize);
 }
 
 char SequenceStore::symbol() const {