diff --git a/netbox/dcim/forms.py b/netbox/dcim/forms.py
index 33f3209e8..2d3eae002 100644
--- a/netbox/dcim/forms.py
+++ b/netbox/dcim/forms.py
@@ -1601,7 +1601,7 @@ class InterfaceCSVForm(forms.ModelForm):
         if self.cleaned_data['device'] is not None:
             lag = Interface.objects.filter(
                 device=self.cleaned_data['device'], form_factor=IFACE_FF_LAG).get(
-                self.cleaned_data['lag']
+                lag=self.cleaned_data['lag']
             )