diff --git a/credential-retrieval/credential/credential.c b/credential-retrieval/credential/credential.c
index 1c7ca74..d158a5a 100644
--- a/credential-retrieval/credential/credential.c
+++ b/credential-retrieval/credential/credential.c
@@ -936,7 +936,7 @@ static int fairplay_selector(uint32_t *selector) {
         return -1;
     }
 
-    *selector = major <= 18 ? 9 : 21;
+    *selector = major <= 19 ? 9 : 21;
     return 0;
 }