diff --git a/src/sentry/options/defaults.py b/src/sentry/options/defaults.py
index b80da5412b650c..77a0b706ac26bb 100644
--- a/src/sentry/options/defaults.py
+++ b/src/sentry/options/defaults.py
@@ -3593,6 +3593,14 @@
     flags=FLAG_MODIFIABLE_BOOL | FLAG_AUTOMATOR_MODIFIABLE,
 )
 
+# Allow list for projects with LLM issue detection enabled
+register(
+    "issue-detection.llm-detection.projects-allowlist",
+    type=Sequence,
+    default=[],
+    flags=FLAG_ALLOW_EMPTY | FLAG_AUTOMATOR_MODIFIABLE,
+)
+
 # The allowlist of organization IDs for which deletion from EAP is enabled.
 register(
     "eventstream.eap.deletion_enabled.organization_allowlist",