diff --git a/C4/Search.pm b/C4/Search.pm
index 235405cf37..71e7a4bd41 100644
--- a/C4/Search.pm
+++ b/C4/Search.pm
@@ -1130,9 +1130,11 @@ sub getIndexes{
                     'date-entered-on-file',
                     'Date-of-acquisition',
                     'Date-of-publication',
+                    'Date-time-last-modified',
                     'Dewey-classification',
                     'Dissertation-information',
                     'diss',
+                    'dtlm',
                     'EAN',
                     'extent',
                     'fic',
diff --git a/etc/zebradb/ccl.properties b/etc/zebradb/ccl.properties
index f65d26921f..6ce7af07a0 100644
--- a/etc/zebradb/ccl.properties
+++ b/etc/zebradb/ccl.properties
@@ -354,6 +354,8 @@ acqdate Date-of-acquisition
 #Date/time last       1012  The date and time a record      005
 #modified                   was last updated.
 Date/time-last-modified       1=1012
+Date-time-last-modified Date/time-last-modified
+dtlm Date/time-last-modified
 
 #Dissertation-        1056  Information about a             MARC21 502/UNIMARC 328
 #information                dissertation thesis, or another