diff --git a/mbed-tls-pr-merge.yaml b/mbed-tls-pr-merge.yaml
index 521ab92..4a6566d 100644
--- a/mbed-tls-pr-merge.yaml
+++ b/mbed-tls-pr-merge.yaml
@@ -38,7 +38,7 @@
         discover-pr-forks-strategy: both
         discover-pr-forks-trust: permission
         discover-pr-origin: both
-        head-filter-regex: '(?!^PR-(7958|7959)-(merge|head)$)(PR-\d+-merge)'
+        head-filter-regex: '(?!PR-7959-merge$)PR-\d+-merge'
         property-strategies:
           all-branches:
           - pipeline-branch-durability-override: performance-optimized