diff --git a/src/calibre/srv/code.py b/src/calibre/srv/code.py
index bf8e8066c9..0fff24c816 100644
--- a/src/calibre/srv/code.py
+++ b/src/calibre/srv/code.py
@@ -207,6 +207,7 @@ def get_library_init_data(ctx, rd, db, num, sorts, orders, vl):
         )
         ans['field_metadata'] = db.field_metadata.all_metadata()
         ans['virtual_libraries'] = db._pref('virtual_libraries', {})
+        ans['bools_are_tristate'] = db._pref('bools_are_tristate', True)
         ans['book_display_fields'] = get_field_list(db)
         mdata = ans['metadata'] = {}
         try:
diff --git a/src/pyj/book_list/book_details.pyj b/src/pyj/book_list/book_details.pyj
index 04cbb899bb..fb4c0f423a 100644
--- a/src/pyj/book_list/book_details.pyj
+++ b/src/pyj/book_list/book_details.pyj
@@ -382,8 +382,10 @@ def render_metadata(mi, table, book_id, iframe_css):  # {{{
                     join = fm.is_multiple.list_to_ui if fm.is_multiple else None
                     add_row(name, val, join=join, is_searchable=field)
             elif datatype is 'bool':
-                # We are missing checking if the pref bools_are_tristate is False
-                v =  _('Yes') if val else ('' if val is undefined or val is None else _('No'))
+                if library_data.bools_are_tristate:
+                    v =  _('Yes') if val else ('' if val is undefined or val is None else _('No'))
+                else:
+                    v = _('Yes') if val else _('No')
                 if v:
                     add_row(name, v, is_searchable=field, use_quotes=False)
             elif datatype is 'int' or datatype is 'float':
diff --git a/src/pyj/book_list/library_data.pyj b/src/pyj/book_list/library_data.pyj
index 4a7048c92a..c5b9c07556 100644
--- a/src/pyj/book_list/library_data.pyj
+++ b/src/pyj/book_list/library_data.pyj
@@ -11,7 +11,7 @@ from session import get_interface_data
 from utils import parse_url_params
 
 load_status = {'loading':True, 'ok':False, 'error_html':None, 'current_fetch': None, 'http_error_code': 0}
-library_data = {'metadata':{}, 'previous_book_ids': v'[]', 'force_refresh': False}
+library_data = {'metadata':{}, 'previous_book_ids': v'[]', 'force_refresh': False, 'bools_are_tristate': True}
 
 
 def current_library_id():
@@ -83,7 +83,7 @@ def update_library_data(data):
     if library_data.for_library is not current_library_id():
         library_data.field_names = {}
     library_data.for_library = current_library_id()
-    for key in 'search_result sortable_fields field_metadata metadata virtual_libraries book_display_fields'.split(' '):
+    for key in 'search_result sortable_fields field_metadata metadata virtual_libraries book_display_fields bools_are_tristate'.split(' '):
         library_data[key] = data[key]
     sr = library_data.search_result
     if sr: