diff --git a/src/earthkit/data/core/fieldlist.py b/src/earthkit/data/core/fieldlist.py
index 878aaacb5..bff2cf305 100644
--- a/src/earthkit/data/core/fieldlist.py
+++ b/src/earthkit/data/core/fieldlist.py
@@ -951,7 +951,7 @@ def _to_fieldlist(self):
 
     @staticmethod
     def _flatten(v):
-        """Flatten the array without copying the data.".
+        """Flatten the array without copying the data.
 
         Parameters
         ----------