diff --git a/DROID_integrity_check.csvs b/DROID_integrity_check.csvs
index 34ecdac..2a9567f 100644
--- a/DROID_integrity_check.csvs
+++ b/DROID_integrity_check.csvs
@@ -1,4 +1,5 @@
 version 1.1
+@totalColumns 18
 /*-----------------------------------------------------------------------------\
 | This schema is designed to run on a CSV exported from The National Archives' |
 | DROID file format identification tool profile.  It will report an error for  |
diff --git a/dedupe_files_from_DROID_report.csvs b/dedupe_files_from_DROID_report.csvs
index cd2498c..01df782 100644
--- a/dedupe_files_from_DROID_report.csvs
+++ b/dedupe_files_from_DROID_report.csvs
@@ -1,4 +1,5 @@
 version 1.1
+@totalColumns 18
 /*-----------------------------------------------------------------------------\
 | This schema is designed to run on a CSV exported from The National Archives' |
 | DROID file format identification tool profile.  It will report an error for  |