diff --git a/src/ZoneLoading/Zone/Stream/Impl/XBlockInputStream.cpp b/src/ZoneLoading/Zone/Stream/Impl/XBlockInputStream.cpp
index a601e479..0c246654 100644
--- a/src/ZoneLoading/Zone/Stream/Impl/XBlockInputStream.cpp
+++ b/src/ZoneLoading/Zone/Stream/Impl/XBlockInputStream.cpp
@@ -89,7 +89,7 @@ void* XBlockInputStream::Alloc(const unsigned align)
 
     Align(align);
 
-    if (m_block_offsets[block->m_index] >= block->m_buffer_size)
+    if (m_block_offsets[block->m_index] > block->m_buffer_size)
     {
         throw BlockOverflowException(block);
     }