diff --git a/psyneulink/core/globals/parameters.py b/psyneulink/core/globals/parameters.py
index f79ce831aa..6ddfbcfedd 100644
--- a/psyneulink/core/globals/parameters.py
+++ b/psyneulink/core/globals/parameters.py
@@ -1505,6 +1505,7 @@ def set(self, value, context=None, override=False, skip_history=False, skip_log=
             raise ParameterError('Parameter \'{0}\' is read-only. Set at your own risk. Pass override=True to force set.'.format(self.name))
 
         value = self._parse(value, check_scalar=True)
+        self._validate(value)
         value = self._set(value, context, skip_history, skip_log, **kwargs)
 
         try: