diff --git a/gwinc/struct.py b/gwinc/struct.py
index 3b767a664b4479f2ad759efb20b5f96c6ed9e801..7c2e0392442e9fb902bd67314be24bdb41455282 100644
--- a/gwinc/struct.py
+++ b/gwinc/struct.py
@@ -294,7 +294,7 @@ class Struct(object):
         """Create Struct from YAML string.
 
         """
-        d = yaml.load(y, Loader=yaml_loader)
+        d = yaml.load(y, Loader=yaml_loader) or {}
         return cls(d)