diff --git a/include/argument_parser.hpp b/include/argument_parser.hpp
index 73f2378..ecd509b 100644
--- a/include/argument_parser.hpp
+++ b/include/argument_parser.hpp
@@ -224,6 +224,7 @@ namespace argument_parser {
             invoked(other.invoked) 
         {}
         argument& operator=(argument const& other) {
+            if (this == &other) return *this; 
             this->~argument(); 
             new(this) argument{other};
             return *this; 
@@ -503,4 +504,4 @@ namespace argument_parser {
     };
 }
 
-#endif // ARGUMENT_PARSER_HPP
\ No newline at end of file
+#endif // ARGUMENT_PARSER_HPP