diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index 4e5cc26..4b980cc 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -1891,9 +1891,9 @@
 		   "regex filter to identify parent, see: '--sort parent'"),
 	OPT_BOOLEAN('x', "exclude-other", &exclude_other,
 		    "Only display entries with parent-match"),
-	OPT_CALLBACK_DEFAULT('c', "callchain", NULL, "output_type,min_percent",
+	OPT_CALLBACK_DEFAULT('g', "call-graph", NULL, "output_type,min_percent",
 		     "Display callchains using output_type and min percent threshold. "
-		     "Default: flat,0", &parse_callchain_opt, callchain_default_opt),
+		     "Default: fractal,0.5", &parse_callchain_opt, callchain_default_opt),
 	OPT_STRING('d', "dsos", &dso_list_str, "dso[,dso...]",
 		   "only consider symbols in these dsos"),
 	OPT_STRING('C', "comms", &comm_list_str, "comm[,comm...]",