diff --git a/config.cpp b/config.cpp
index 7980619b..e970c3c5 100644
--- a/config.cpp
+++ b/config.cpp
@@ -2481,6 +2481,10 @@ EX int read_config_args() {
   else if(argis("-csc")) {
     PHASEFROM(2); shift_arg_formula(vid.creature_scale);
     }
+  else if(argis("-neon")) {
+    PHASEFROM(2);
+    shift(); neon_mode = argi();
+    }
   else if(argis("-char")) {
     auto& cs = vid.cs;
     shift(); cs.charid = argi();