diff --git a/reservations/models.py b/reservations/models.py
index 1c25ad6..fa436c4 100644
--- a/reservations/models.py
+++ b/reservations/models.py
@@ -101,7 +101,10 @@ class Reservation(models.Model):
         ]
 
     def __str__(self) -> str:
-        resources = ", ".join(str(resource) for resource in self.resources.all())
+        try:
+            resources = ", ".join(str(resource) for resource in self.resources.all())
+        except ValueError:
+            resources = "no resources"
         return f"{resources}: {self.start} - {self.end}"
 
     def __repr__(self) -> str: