diff --git a/libprocessgroup/include/processgroup/processgroup.h b/libprocessgroup/include/processgroup/processgroup.h
index 98179e8..0aa14ba 100644
--- a/libprocessgroup/include/processgroup/processgroup.h
+++ b/libprocessgroup/include/processgroup/processgroup.h
@@ -79,6 +79,7 @@
 
 // Set various properties of a process group. For these functions to work, the process group must
 // have been created by passing memControl=true to createProcessGroup.
+[[deprecated("Unsupported in memcg v2")]]
 bool setProcessGroupSwappiness(uid_t uid, pid_t initialPid, int swappiness);
 bool setProcessGroupSoftLimit(uid_t uid, pid_t initialPid, int64_t softLimitInBytes);
 bool setProcessGroupLimit(uid_t uid, pid_t initialPid, int64_t limitInBytes);