diff --git a/VERSIONLOG.md b/VERSIONLOG.md
index ecadad67..09cf7f34 100644
--- a/VERSIONLOG.md
+++ b/VERSIONLOG.md
@@ -1,5 +1,9 @@
 # TACA Version Log
 
+## 20240208.1
+
+Fix bug with isinstance clause
+
 ## 20240202.1
 
 Use abspath for Anglerfish stderr path, make it possible to instantiate ONT run w/o specifying the type, add more info to the ONT db update subcommand.
diff --git a/taca/utils/transfer.py b/taca/utils/transfer.py
index 693f0725..6dd45791 100644
--- a/taca/utils/transfer.py
+++ b/taca/utils/transfer.py
@@ -56,7 +56,7 @@ def format_options(self):
             if val is None:
                 cmdopts.append(param)
             else:
-                if isinstance(type(val), str):
+                if isinstance(val, str):
                     val = [val]
                 for v in val:
                     cmdopts.append(f"{param}={v}")