diff --git a/propulate/propagators/pso.py b/propulate/propagators/pso.py
index 8f28ca6a..d4d9d670 100644
--- a/propulate/propagators/pso.py
+++ b/propulate/propagators/pso.py
@@ -365,7 +365,7 @@ class CanonicalPSO(ConstrictionPSO):
 
     See Also
     --------
-    :class:``ConstrictionPSO`` : Parent class
+    :class: ``ConstrictionPSO`` : Parent class
     """
 
     def __init__(self, c_cognitive, c_social, rank, limits, rng):