diff --git a/Source/Core/Core/Boot/DolReader.cpp b/Source/Core/Core/Boot/DolReader.cpp
index 8abf98fb7f..a374ec02d0 100644
--- a/Source/Core/Core/Boot/DolReader.cpp
+++ b/Source/Core/Core/Boot/DolReader.cpp
@@ -116,7 +116,7 @@ bool DolReader::Initialize(std::span<const u8> buffer)
         section.m_address == ESPRESSO_ANCAST_LOCATION_VIRT &&
         Common::swap32(section.m_data.data()) == ANCAST_MAGIC)
     {
-      m_ancast_index = i;
+      m_ancast_index = m_sections.size() - 1;
     }
   }
 
diff --git a/Source/Core/Core/Boot/DolReader.h b/Source/Core/Core/Boot/DolReader.h
index 1332ae0661..5a02da4070 100644
--- a/Source/Core/Core/Boot/DolReader.h
+++ b/Source/Core/Core/Boot/DolReader.h
@@ -70,7 +70,7 @@ private:
 
   bool m_is_valid;
   bool m_is_wii;
-  std::optional<u8> m_ancast_index;
+  std::optional<std::size_t> m_ancast_index;
 
   // Copy sections to internal buffers
   bool Initialize(std::span<const u8> buffer);