diff --git a/deps/ox/src/ox/std/iterator.hpp b/deps/ox/src/ox/std/iterator.hpp
index b8310607..0e85b643 100644
--- a/deps/ox/src/ox/std/iterator.hpp
+++ b/deps/ox/src/ox/std/iterator.hpp
@@ -8,6 +8,7 @@
 
 #pragma once
 
+#include "error.hpp"
 #include "math.hpp"
 
 #if !__has_include(<iterator>)
@@ -129,14 +130,17 @@ struct SpanIterator {
 		}
 
 		constexpr PtrType operator->() const noexcept {
+			ox::primitiveAssert(__FILE__, __LINE__, m_offset < m_max, "SpanIterator access overflow");
 			return &m_t[m_offset];
 		}
 
 		constexpr RefType operator*() const noexcept {
+			ox::primitiveAssert(__FILE__, __LINE__, m_offset < m_max, "SpanIterator access overflow");
 			return m_t[m_offset];
 		}
 
 		constexpr RefType operator[](std::size_t s) const noexcept {
+			ox::primitiveAssert(__FILE__, __LINE__, s < m_max, "SpanIterator access overflow");
 			return m_t[s];
 		}