diff --git a/cputree.c b/cputree.c
index eed20db..fda0200 100644
--- a/cputree.c
+++ b/cputree.c
@@ -102,7 +102,7 @@ static void get_mask_from_cpulist(char *line, void *mask)
 /*
  * By default do not place IRQs on CPUs the kernel keeps isolated or
  * nohz_full, as specified through the boot commandline. Users can
- * override this with the IRQBALANCE_BANNED_CPUS environment variable.
+ * override this with the IRQBALANCE_BANNED_CPULIST environment variable.
  */
 static void setup_banned_cpus(void)
 {
@@ -118,9 +118,20 @@ static void setup_banned_cpus(void)
 			strlen(banned_cpumask_from_ui), banned_cpus);
 		goto out;
 	}
+
+	/*
+	 * Notes:
+	 * The IRQBALANCE_BANNED_CPUS will be discarded, please use
+	 * IRQBALANCE_BANNED_CPULIST instead.
+	 *
+	 * Before deleting this environment variable, Introduce a
+	 * deprecation period first for the consider of compatibility.
+	 */
 	env = getenv("IRQBALANCE_BANNED_CPUS");
 	if (env && strlen(env))  {
 		cpumask_parse_user(env, strlen(env), banned_cpus);
+		log(TO_ALL, LOG_WARNING,
+			"IRQBALANCE_BANNED_CPUS is discarded, Use IRQBALANCE_BANNED_CPULIST instead\n");
 		goto out;
 	}
 
diff --git a/irqbalance.1 b/irqbalance.1
index fb96664..215f75a 100644
--- a/irqbalance.1
+++ b/irqbalance.1
@@ -163,7 +163,9 @@ processors, each group of eight hex digits is separated by a comma ’,’. i.e.
 to the 7th-12th cpus (cpu6-cpu11) or ‘export IRQBALANCE_BANNED_CPUS=ff000000,00000001‘
 would prevent irqbalance from assigning irqs to the 1st (cpu0) and 57th-64th cpus
 (cpu56-cpu63).
-
+Notes: This environment variable will be discarded, please use IRQBALANCE_BANNED_CPULIST
+instead. Before deleting this environment variable, Introduce a deprecation period first
+for the consider of compatibility.
 
 .TP
 .B IRQBALANCE_BANNED_CPULIST