diff --git a/lib/net/ber/core_ext/string.rb b/lib/net/ber/core_ext/string.rb
index a0fcfb46..b4ad8039 100644
--- a/lib/net/ber/core_ext/string.rb
+++ b/lib/net/ber/core_ext/string.rb
@@ -33,7 +33,9 @@ def raw_utf8_encoded
       rescue Encoding::UndefinedConversionError
         self
       rescue Encoding::ConverterNotFoundError
-        return self
+        self
+      rescue Encoding::InvalidByteSequenceError
+        self
       end
     else
       self