diff --git a/maas/client/utils/multipart.py b/maas/client/utils/multipart.py
index 53f5ea5..cb978ab 100644
--- a/maas/client/utils/multipart.py
+++ b/maas/client/utils/multipart.py
@@ -90,6 +90,8 @@ def make_payloads(name, content):
             yield make_bytes_payload(name, b"false")
     elif isinstance(content, int):
         yield make_bytes_payload(name, b"%d" % content)
+    elif isinstance(content, float):
+        yield make_bytes_payload(name, b"%f" % content)
     elif isinstance(content, bytes):
         yield make_bytes_payload(name, content)
     elif isinstance(content, str):