diff --git a/src/calibre/db/cache.py b/src/calibre/db/cache.py
index e1ed78e1cd..3a23c8ed4a 100644
--- a/src/calibre/db/cache.py
+++ b/src/calibre/db/cache.py
@@ -670,7 +670,7 @@ class Cache(object):
         Copy the cover to the file like object ``dest``. Returns False
         if no cover exists or dest is the same file as the current cover.
         dest can also be a path in which case the cover is
-        copied to it iff the path is different from the current path (taking
+        copied to it if and only if the path is different from the current path (taking
         case sensitivity into account).
         '''
         try: