diff --git a/rtos/code/application/source/cardv/SrcCode/Dx/565_HUNTING_EVB_LINUX_4G_S550/DxHunting.c b/rtos/code/application/source/cardv/SrcCode/Dx/565_HUNTING_EVB_LINUX_4G_S550/DxHunting.c
index 68b2cd3f8..c7808969b 100755
--- a/rtos/code/application/source/cardv/SrcCode/Dx/565_HUNTING_EVB_LINUX_4G_S550/DxHunting.c
+++ b/rtos/code/application/source/cardv/SrcCode/Dx/565_HUNTING_EVB_LINUX_4G_S550/DxHunting.c
@@ -515,7 +515,13 @@ void sf_ir_led_set(UINT8 mode, UINT8 flashLed, UINT8 stillExp, UINT8 isSnapVideo
         pwm_cfg.ui_rise = ui_rise;
         pwm_pwm_config_clock_div(PWM0_3_CLKDIV, 14);//pwm clk = 120M/clk div+1/period
 		pwm_pwm_config(IRLED_PWMID, &pwm_cfg);
-        pwm_pwm_enable(IRLED_PWMID);
+        if(0 != pwm_pwm_enable(IRLED_PWMID))
+        {
+            pwm_pwm_disable(IRLED_PWMID);
+            pwm_pwm_config_clock_div(PWM0_3_CLKDIV, 14);//pwm clk = 120M/clk div+1/period
+            pwm_pwm_config(IRLED_PWMID, &pwm_cfg);
+            pwm_pwm_enable(IRLED_PWMID);
+        }
         
 		IsNightLedOn = 1;
         sf_set_night_led_flag(1);