diff --git a/tools/perf/util/sort.c b/tools/perf/util/sort.c
index ec722346e6ff..898e4b0724bf 100644
--- a/tools/perf/util/sort.c
+++ b/tools/perf/util/sort.c
@@ -25,6 +25,7 @@ int		sort__has_parent = 0;
 int		sort__has_sym = 0;
 int		sort__has_dso = 0;
 int		sort__has_socket = 0;
+int		sort__has_thread = 0;
 enum sort_mode	sort__mode = SORT_MODE__NORMAL;
 
 
@@ -2136,6 +2137,8 @@ static int sort_dimension__add(const char *tok,
 			sort__has_dso = 1;
 		} else if (sd->entry == &sort_socket) {
 			sort__has_socket = 1;
+		} else if (sd->entry == &sort_thread) {
+			sort__has_thread = 1;
 		}
 
 		return __sort_dimension__add(sd);
diff --git a/tools/perf/util/sort.h b/tools/perf/util/sort.h
index 687bbb124428..09616f03d412 100644
--- a/tools/perf/util/sort.h
+++ b/tools/perf/util/sort.h
@@ -35,6 +35,7 @@ extern int sort__need_collapse;
 extern int sort__has_parent;
 extern int sort__has_sym;
 extern int sort__has_socket;
+extern int sort__has_thread;
 extern enum sort_mode sort__mode;
 extern struct sort_entry sort_comm;
 extern struct sort_entry sort_dso;