diff --git a/eos/options.py b/eos/options.py
index 233e41e..2683f23 100644
--- a/eos/options.py
+++ b/eos/options.py
@@ -526,6 +526,13 @@ class ReflectivityOutputConfig(ArgParsable):
                 'help': '?',
                 },
             )
+    logFile: bool = field(
+            default = False,
+            metadata = {
+                'group': 'output',
+                'help': 'write log file "eos.log"',
+                }
+            )
     plot: bool = field(
             default=False,
             metadata={