diff --git a/deerlab/model.py b/deerlab/model.py
index 406804d3..252b95b6 100644
--- a/deerlab/model.py
+++ b/deerlab/model.py
@@ -939,15 +939,17 @@ def _print_fitresults(fitresult,model):
     
     hasregularization = fitresult.regparam!=0
     haspenalties = fitresult.penweights
-    if hasregularization and haspenalties:
+    if hasregularization or haspenalties:
         string += 'Model hyperparameters: \n'
         tags = []
         values = []
         alignment = [] 
         if hasregularization:
             alignment.append('^')
-            tags.append('Regularization parameter')        
-            values.append(fitresult.regparam) 
+            tags.append('Regularization parameter')      
+            regparam = fitresult.regparam
+            if regparam is None: regparam = 0  
+            values.append(regparam) 
         if haspenalties:
             for n,penweight in enumerate(fitresult.penweights):
                 alignment.append('^')