diff --git a/buku b/buku
index e2b4b23..e21069e 100755
--- a/buku
+++ b/buku
@@ -4183,7 +4183,7 @@ def print_rec_with_filter(records, field_filter=0):
         sys.exit(1)
 
 
-def print_single_rec(row: BookmarkVar, idx: Optional[int]=0):  # NOQA
+def print_single_rec(row: BookmarkVar, idx: Optional[int] = 0):  # NOQA
     """Print a single DB record.
 
     Handles both search results and individual record.