diff --git a/tools/perf/util/sort.c b/tools/perf/util/sort.c
index 9da8931d23948cb12d962867135d691b0e8b83cb..254f583a52abff9dbbbcf7cd23b4f150839fe7e3 100644
--- a/tools/perf/util/sort.c
+++ b/tools/perf/util/sort.c
@@ -1582,6 +1582,9 @@ void reset_output_field(void)
 	sort__has_sym = 0;
 	sort__has_dso = 0;
 
+	field_order = NULL;
+	sort_order = NULL;
+
 	reset_dimensions();
 	perf_hpp__reset_output_field();
 }