diff --git a/doc/dev/release-checklists.rst b/doc/dev/release-checklists.rst
index 7f635a20c66b1..0281efdf048a8 100644
--- a/doc/dev/release-checklists.rst
+++ b/doc/dev/release-checklists.rst
@@ -63,7 +63,7 @@ Docs
 Feature bits
 ------------
 
-- [ ] ensure that `SERVER_X` is defined
+- [x] ensure that `SERVER_X` is defined
 - [ ] change any features `DEPRECATED` in release X-3 are now marked `RETIRED`.
 - [ ] look for features that (1) were present in X-2 and (2) have no
   client dependency and mark them `DEPRECATED` as of X.
diff --git a/src/include/ceph_features.h b/src/include/ceph_features.h
index 794e10efd7a8d..1937eeb4c6987 100644
--- a/src/include/ceph_features.h
+++ b/src/include/ceph_features.h
@@ -157,7 +157,7 @@ DEFINE_CEPH_FEATURE(47, 1, MDS_QUOTA)        // 4.17
 DEFINE_CEPH_FEATURE(48, 1, CRUSH_V4)         // 4.1
 DEFINE_CEPH_FEATURE_RETIRED(49, 1, OSD_MIN_SIZE_RECOVERY, JEWEL, LUMINOUS)
 DEFINE_CEPH_FEATURE_RETIRED(49, 1, OSD_PROXY_FEATURES, JEWEL, LUMINOUS) // overlap
-// available
+DEFINE_CEPH_FEATURE(49, 2, SERVER_SQUID);
 DEFINE_CEPH_FEATURE_RETIRED(50, 1, MON_METADATA, MIMIC, OCTOPUS)
 // available
 DEFINE_CEPH_FEATURE_RETIRED(51, 1, OSD_BITWISE_HOBJ_SORT, MIMIC, OCTOPUS)
@@ -252,6 +252,7 @@ DEFINE_CEPH_FEATURE_RETIRED(63, 1, RESERVED_BROKEN, LUMINOUS, QUINCY) // client-
 	 CEPH_FEATUREMASK_SERVER_QUINCY | \
 	 CEPH_FEATURE_RANGE_BLOCKLIST | \
 	 CEPH_FEATUREMASK_SERVER_REEF | \
+	 CEPH_FEATUREMASK_SERVER_SQUID | \
 	 0ULL)
 
 #define CEPH_FEATURES_SUPPORTED_DEFAULT  CEPH_FEATURES_ALL