diff --git a/ngraph/core/include/ngraph/log.hpp b/ngraph/core/include/ngraph/log.hpp
index 10b444894ac..f101ef14241 100644
--- a/ngraph/core/include/ngraph/log.hpp
+++ b/ngraph/core/include/ngraph/log.hpp
@@ -36,7 +36,10 @@ namespace ngraph
         {
             return i < m_size ? m_string[i] : throw std::out_of_range("");
         }
-        constexpr const char* get_ptr(size_t offset) const { return &m_string[offset]; }
+        constexpr const char* get_ptr(size_t offset) const
+        {
+            return offset < m_size ? &m_string[offset] : nullptr;
+        }
         constexpr size_t size() const { return m_size; }
 
     private: