diff --git a/src/streams.h b/src/streams.h
index e5a18c56b74..be6b7452a86 100644
--- a/src/streams.h
+++ b/src/streams.h
@@ -117,6 +117,9 @@ public:
 
     void ignore(size_t n)
     {
+        if (n > m_data.size()) {
+            throw std::ios_base::failure("SpanReader::ignore(): end of data");
+        }
         m_data = m_data.subspan(n);
     }
 };