diff --git a/Source/Core/DiscIO/DiscScrubber.cpp b/Source/Core/DiscIO/DiscScrubber.cpp
index 0c944a782a..121f5dbe25 100644
--- a/Source/Core/DiscIO/DiscScrubber.cpp
+++ b/Source/Core/DiscIO/DiscScrubber.cpp
@@ -44,7 +44,8 @@ bool DiscScrubber::SetupScrub(const Volume* disc, int block_size)
 
   m_file_size = m_disc->GetSize();
 
-  const size_t num_clusters = static_cast<size_t>(m_file_size / CLUSTER_SIZE);
+  // Round up when diving by CLUSTER_SIZE, otherwise MarkAsUsed might write out of bounds
+  const size_t num_clusters = static_cast<size_t>((m_file_size + CLUSTER_SIZE - 1) / CLUSTER_SIZE);
 
   // Warn if not DVD5 or DVD9 size
   if (num_clusters != 0x23048 && num_clusters != 0x46090)
diff --git a/Source/Core/DolphinQt/Config/VerifyWidget.cpp b/Source/Core/DolphinQt/Config/VerifyWidget.cpp
index dd96c6ba9b..8fc16d5a66 100644
--- a/Source/Core/DolphinQt/Config/VerifyWidget.cpp
+++ b/Source/Core/DolphinQt/Config/VerifyWidget.cpp
@@ -117,7 +117,7 @@ void VerifyWidget::Verify()
   verifier.Finish();
 
   DiscIO::VolumeVerifier::Result result = verifier.GetResult();
-  progress->setValue(verifier.GetBytesProcessed() / DIVISOR);
+  progress->reset();
 
   m_summary_text->setText(QString::fromStdString(result.summary_text));