diff --git a/argument.cpp b/argument.cpp
index 11d9814..8931969 100644
--- a/argument.cpp
+++ b/argument.cpp
@@ -65,7 +65,7 @@
 
         if (i->val)
         {
-            arguments[i->name] = (i->has_arg ? optarg : trueString);
+            arguments[i->name] = (optarg ? optarg : trueString);
         }
     }
 }