diff --git a/lib/common/grid_util/AffinityResourceControl.cc b/lib/common/grid_util/AffinityResourceControl.cc
index ce6672d..6c2360a 100644
--- a/lib/common/grid_util/AffinityResourceControl.cc
+++ b/lib/common/grid_util/AffinityResourceControl.cc
@@ -5,6 +5,7 @@
 #include "NumaUtil.h"
 #include "ShmAffinityInfo.h"
 
+#include <algorithm> // sort
 #include <iostream> // debug
 #include <unistd.h> // getpid()
 #include <unordered_set>