diff --git a/lldp_8021qaz_cmds.c b/lldp_8021qaz_cmds.c
index 0db2c9c..4f23229 100644
--- a/lldp_8021qaz_cmds.c
+++ b/lldp_8021qaz_cmds.c
@@ -821,7 +821,7 @@ _set_arg_tsa(struct cmd *cmd, char *args, const char *arg_value,
 			toked_maps = strtok(NULL, ",");
 		}
 	} else if (!test) {
-		memset(tsa, 0, sizeof(tsa));
+		memset(tsa, 0, sizeof(u8));
 	}
 
 	if (test) {