diff --git a/ippisite/ippidb/forms.py b/ippisite/ippidb/forms.py
index 4e1791300bc41b4b3305b8de7f14e3892902f0c3..b8fbd3e9e8771fa1c5d97a03059c183e1b94332f 100644
--- a/ippisite/ippidb/forms.py
+++ b/ippisite/ippidb/forms.py
@@ -37,8 +37,7 @@ class ProteinForm(ModelForm):
         	'entry_name' : forms.TextInput(attrs={'placeholder':'e.g KMT2A_HUMAN'}),
         }
 
-ProteinFormSet = modelformset_factory(Protein, exclude=('recommended_name_long', 'short_name'))
-formset=ProteinFormSet()
+ProteinFormSet = modelformset_factory(Protein, exclude=('recommended_name_long', 'short_name'), extra=0)
 
 
 ARCHI_TYPE = (