diff --git a/tools/perf/builtin-diff.c b/tools/perf/builtin-diff.c
index 419d27d..9c82888 100644
--- a/tools/perf/builtin-diff.c
+++ b/tools/perf/builtin-diff.c
@@ -303,12 +303,11 @@
 	return -1;
 }
 
-static int hists__add_entry(struct hists *self,
+static int hists__add_entry(struct hists *hists,
 			    struct addr_location *al, u64 period,
 			    u64 weight, u64 transaction)
 {
-	if (__hists__add_entry(self, al, NULL, period, weight, transaction)
-	    != NULL)
+	if (__hists__add_entry(hists, al, NULL, period, weight, transaction) != NULL)
 		return 0;
 	return -ENOMEM;
 }