diff --git a/pretix_oidc/auth.py b/pretix_oidc/auth.py
index 2936fc7532ea21a89ea91fc11c2a1a5f8ea3d432..9e4bfcedccfba14b3266a6d7e4c2aeaa61d2c0e3 100644
--- a/pretix_oidc/auth.py
+++ b/pretix_oidc/auth.py
@@ -101,7 +101,7 @@ class OIDCAuthBackend(BaseAuthBackend):
         if response_state not in oidc_state:
             return [None, None]
 
-        if oidc_state[response_state]["generated_on"] < time.time() + 5 * 60:
+        if oidc_state[response_state]["generated_on"] < time.time() - 5 * 60:
             return [None, None]
 
         request.session["oidc_next_url"] = oidc_state[response_state]["next"]