diff --git a/trick_source/codegen/Interface_Code_Gen/FieldDescription.cpp b/trick_source/codegen/Interface_Code_Gen/FieldDescription.cpp
index 2fd8a0aa..5a88d892 100644
--- a/trick_source/codegen/Interface_Code_Gen/FieldDescription.cpp
+++ b/trick_source/codegen/Interface_Code_Gen/FieldDescription.cpp
@@ -163,13 +163,13 @@ void FieldDescription::parseComment(std::string comment) {
         comment = get_regex_field(comment , "(.*)@?trick_io[\\({]([^\\)}]+)[\\)}]" , 1) +
          get_regex_field(comment , "@?trick_io[\\({]([^\\)}]+)[\\)}](.*)" , 2) ;
     }
-    ret_str = get_regex_field(comment , "@?io[\\({]([^\\)}]+)[\\)}]" , 1) ;
+    ret_str = get_regex_field(comment , "(^|[^*])@?io[\\({]([^\\)}]+)[\\)}]" , 2) ;
     if ( ! ret_str.empty()) {
         io = io_map[ret_str] ;
         if(debug_level >= 4) std::cout << "go for io " <<  io << std::endl ;
         io_found = true ;
-        comment = get_regex_field(comment , "(.*)@?io[\\({]([^\\)}]+)[\\)}]" , 1) +
-         get_regex_field(comment , "@?io[\\({]([^\\)}]+)[\\)}](.*)" , 2) ;
+        comment = get_regex_field(comment , "(.*)(^|[^*])@?io[\\({]([^\\)}]+)[\\)}]" , 1) +
+         get_regex_field(comment , "(^|[^*])@?io[\\({]([^\\)}]+)[\\)}](.*)" , 3) ;
     }
 
     /*