diff --git a/tools/perf/util/help-unknown-cmd.c b/tools/perf/util/help-unknown-cmd.c
index ab9e16123626..eab99ea6ac01 100644
--- a/tools/perf/util/help-unknown-cmd.c
+++ b/tools/perf/util/help-unknown-cmd.c
@@ -92,6 +92,7 @@ const char *help_unknown_cmd(const char *cmd)
 
 		main_cmds.names[0] = NULL;
 		clean_cmdnames(&main_cmds);
+		clean_cmdnames(&other_cmds);
 		fprintf(stderr, "WARNING: You called a perf program named '%s', "
 			"which does not exist.\n"
 			"Continuing under the assumption that you meant '%s'\n",
@@ -114,5 +115,7 @@ const char *help_unknown_cmd(const char *cmd)
 			fprintf(stderr, "\t%s\n", main_cmds.names[i]->name);
 	}
 end:
+	clean_cmdnames(&main_cmds);
+	clean_cmdnames(&other_cmds);
 	exit(1);
 }