diff --git a/trick_source/codegen/Interface_Code_Gen/PrintAttributes.cpp b/trick_source/codegen/Interface_Code_Gen/PrintAttributes.cpp
index d3210c58..fa6e5fc1 100644
--- a/trick_source/codegen/Interface_Code_Gen/PrintAttributes.cpp
+++ b/trick_source/codegen/Interface_Code_Gen/PrintAttributes.cpp
@@ -162,6 +162,9 @@ bool PrintAttributes::openIOFile(std::string header_file_name) {
                                            open the file and write header information */
                                         outfile.open(out_of_date_io_files[header_file_name].c_str()) ;
                                         printer->printIOHeader(outfile, header_file_name) ;
+                                        if ( ! cs.hasTrickHeader(header_file_name) ) {
+                                            std::cout << "No Trick header comment found in " << header_file_name << "" << std::endl ;
+                                        }
                                         std::cout << "Writing " << out_of_date_io_files[header_file_name] << "" << std::endl ;
                                         // Get all of the ignored types from this file.
                                         ignored_types[header_file_name] = cs.getIgnoreTypes(header_file_name) ;