diff --git a/src/python/jw/pkg/lib/FileContext.py b/src/python/jw/pkg/lib/FileContext.py
index 059152d7..2622e7e8 100644
--- a/src/python/jw/pkg/lib/FileContext.py
+++ b/src/python/jw/pkg/lib/FileContext.py
@@ -287,7 +287,7 @@ class FileContext(abc.ABC):
                 DEBUG,
                 (
                     f"{self.log_name} doesn't implement stat(), judging by trailing "
-                    'slash if {path} is a directory'
+                    f'slash if {path} is a directory'
                 ),
             )
             return path[-1] == '/'