diff --git a/src/calibre/library/catalog.py b/src/calibre/library/catalog.py
index e20eebc517..bc6ff7f64f 100644
--- a/src/calibre/library/catalog.py
+++ b/src/calibre/library/catalog.py
@@ -53,6 +53,7 @@ class CSV_XML(CatalogPlugin): # {{{
                     'database.  Should be a comma-separated list of fields.\n'
                     'Available fields: %s,\n'
                     'plus user-created custom fields.\n'
+                    'Example: --fields=title,authors,tags\n'
                     "Default: '%%default'\n"
                     "Applies to: CSV, XML output formats")%', '.join(FIELDS)),
 
@@ -230,6 +231,7 @@ class BIBTEX(CatalogPlugin): # {{{
                 help = _('The fields to output when cataloging books in the '
                     'database.  Should be a comma-separated list of fields.\n'
                     'Available fields: %s.\n'
+                    'Example: --fields=title,authors,tags\n'
                     "Default: '%%default'\n"
                     "Applies to: BIBTEX output format")%', '.join(FIELDS)),
 
@@ -523,7 +525,7 @@ class BIBTEX(CatalogPlugin): # {{{
                 citation_bibtex= True
         else :
             citation_bibtex= opts.impcit
-        
+
         #Check add file entry and go to default in case of bad CLI
         if isinstance(opts.addfiles, (StringType, UnicodeType)) :
             if opts.addfiles == 'False' :