1 files changed, 2 insertions, 1 deletions
diff --git a/contrib/epee/include/span.h b/contrib/epee/include/span.h
index e100452ca..59895535f 100644
--- a/contrib/epee/include/span.h
+++ b/contrib/epee/include/span.h
@@ -110,7 +110,8 @@ namespace epee
     constexpr std::size_t size() const noexcept { return len; }
     constexpr std::size_t size_bytes() const noexcept { return size() * sizeof(value_type); }
 
-    const T &operator[](size_t idx) const { return ptr[idx]; }
+    T &operator[](size_t idx) noexcept { return ptr[idx]; }
+    const T &operator[](size_t idx) const noexcept { return ptr[idx]; }
 
   private:
     T* ptr;