diff --git a/netbox/dcim/forms.py b/netbox/dcim/forms.py
index b0cb8434f..ac8fc40d5 100644
--- a/netbox/dcim/forms.py
+++ b/netbox/dcim/forms.py
@@ -845,9 +845,10 @@ class RackReservationCSVForm(forms.ModelForm):
     rack_name = forms.CharField(
         help_text="Rack name"
     )
-    units = forms.CharField(
+    units = SimpleArrayField(
+        base_field=forms.IntegerField(),
         required=True,
-        help_text='Rack units'
+        help_text='Comma-separated list of individual unit numbers'
     )
     tenant = forms.ModelChoiceField(
         queryset=Tenant.objects.all(),