diff --git a/stress/utils/util.py b/stress/utils/util.py
index f90796d..ec63b99 100644
--- a/stress/utils/util.py
+++ b/stress/utils/util.py
@@ -50,6 +50,6 @@
 
 
 def enum(*sequential, **named):
-    """Create auto-incremented enumerated types"""
+    """Create auto-incremented enumerated types."""
     enums = dict(zip(sequential, range(len(sequential))), **named)
     return type('Enum', (), enums)