diff --git a/setup.m b/setup.m
index b9f8b02..7cc7371 100644
--- a/setup.m
+++ b/setup.m
@@ -1,19 +1,19 @@
 function setup()
     % to execute once after cloning the repo.
     createDefaultConfigFile();
 
     addpath(genpath(pwd));
 end
 
 
 
 function createDefaultConfigFile()
     defaultConfig.maxSCaseIDDigits = 3;
-    defaultConfig.SCaseIDValidTypes = "NP";
+    defaultConfig.SCaseIDValidTypes = ["N", "P"];
     defaultConfig.pythonDir = "/shoulder/methods/python/rcseg";
     defaultConfig.dataDir = "/shoulder/dataDev";
 
     fid = fopen('config.json','w');
     fprintf(fid, replace(jsonencode(defaultConfig), ",", ",\n"));
     fclose(fid);
 end
\ No newline at end of file