diff --git a/kernel/include/kernel/Memory/ByteRingBuffer.h b/kernel/include/kernel/Memory/ByteRingBuffer.h
index ef7be9fc..9794ff39 100644
--- a/kernel/include/kernel/Memory/ByteRingBuffer.h
+++ b/kernel/include/kernel/Memory/ByteRingBuffer.h
@@ -51,7 +51,7 @@ namespace Kernel
 		uint8_t back() const
 		{
 			ASSERT(!empty());
-			return reinterpret_cast<const uint8_t*>(m_vaddr)[m_tail + m_size];
+			return reinterpret_cast<const uint8_t*>(m_vaddr)[m_tail + m_size - 1];
 		}
 
 		bool empty() const { return m_size == 0; }