diff --git a/src/calibre/library/server/browse.py b/src/calibre/library/server/browse.py
index 182d3365bc..585c1255a4 100644
--- a/src/calibre/library/server/browse.py
+++ b/src/calibre/library/server/browse.py
@@ -346,7 +346,7 @@ class BrowseServer(object):
         for category in sorted(categories, key=lambda x: sort_key(getter(x))):
             if len(categories[category]) == 0:
                 continue
-            if category == 'formats' or category == 'identifiers':
+            if category in ('formats', 'identifiers'):
                 continue
             meta = category_meta.get(category, None)
             if meta is None:
diff --git a/src/calibre/library/server/opds.py b/src/calibre/library/server/opds.py
index 0e7ed91388..e7fdffbbbb 100644
--- a/src/calibre/library/server/opds.py
+++ b/src/calibre/library/server/opds.py
@@ -580,7 +580,7 @@ class OPDSServer(object):
         for category in sorted(categories, key=lambda x: sort_key(getter(x))):
             if len(categories[category]) == 0:
                 continue
-            if category == 'formats' or category == 'identifiers':
+            if category in ('formats', 'identifiers'):
                 continue
             meta = category_meta.get(category, None)
             if meta is None: