diff --git a/bsp/wch/arm/Libraries/ch32_drivers/drv_gpio_ch32f10x.c b/bsp/wch/arm/Libraries/ch32_drivers/drv_gpio_ch32f10x.c
index 3bc934fc7b..b10f96d14f 100644
--- a/bsp/wch/arm/Libraries/ch32_drivers/drv_gpio_ch32f10x.c
+++ b/bsp/wch/arm/Libraries/ch32_drivers/drv_gpio_ch32f10x.c
@@ -249,7 +249,7 @@ static rt_err_t exti_line_irq_list_bind(struct rt_pin_irq_hdr *irq_hdr)
 
 static rt_err_t exti_line_irq_list_unbind(rt_int16_t pin)
 {
-    rt_err_t ret = RT_EEMPTY;
+    rt_err_t ret = -RT_EEMPTY;
     rt_base_t level;
     struct exti_line_irq *item;
 
diff --git a/bsp/wch/arm/Libraries/ch32_drivers/drv_gpio_ch32f20x.c b/bsp/wch/arm/Libraries/ch32_drivers/drv_gpio_ch32f20x.c
index f5a72b0c65..1e6714a638 100644
--- a/bsp/wch/arm/Libraries/ch32_drivers/drv_gpio_ch32f20x.c
+++ b/bsp/wch/arm/Libraries/ch32_drivers/drv_gpio_ch32f20x.c
@@ -280,7 +280,7 @@ static rt_err_t exti_line_irq_list_bind(struct rt_pin_irq_hdr *irq_hdr)
 
 static rt_err_t exti_line_irq_list_unbind(rt_int16_t pin)
 {
-    rt_err_t ret = RT_EEMPTY;
+    rt_err_t ret = -RT_EEMPTY;
     rt_base_t level;
     struct exti_line_irq *item;