diff --git a/firmware/export/jz4740.h b/firmware/export/jz4740.h
index 820b43f880..379c9f8aaa 100644
--- a/firmware/export/jz4740.h
+++ b/firmware/export/jz4740.h
@@ -3546,8 +3546,8 @@ static __inline__ void __cpm_select_msc_hs_clk(int sd)
 #define __tcu_set_pwm_output_shutdown_graceful(n)    ( REG_TCU_TCSR((n)) &= ~TCU_TCSR_PWM_SD )
 #define __tcu_set_pwm_output_shutdown_abrupt(n)        ( REG_TCU_TCSR((n)) |= TCU_TCSR_PWM_SD )
 
-#define __tcu_start_counter(n)        ( REG_TCU_TESR |= (1 << (n)) )
-#define __tcu_stop_counter(n)        ( REG_TCU_TECR |= (1 << (n)) )
+#define __tcu_start_counter(n)        ( REG_TCU_TESR = (1 << (n)) )
+#define __tcu_stop_counter(n)        ( REG_TCU_TECR = (1 << (n)) )
 
 #define __tcu_half_match_flag(n)    ( REG_TCU_TFR & (1 << ((n) + 16)) )
 #define __tcu_full_match_flag(n)    ( REG_TCU_TFR & (1 << (n)) )
diff --git a/firmware/target/mips/ingenic_jz47xx/system-jz4740.c b/firmware/target/mips/ingenic_jz47xx/system-jz4740.c
index f7df690dd5..ab232baf65 100644
--- a/firmware/target/mips/ingenic_jz47xx/system-jz4740.c
+++ b/firmware/target/mips/ingenic_jz47xx/system-jz4740.c
@@ -137,7 +137,7 @@ static void dis_irq(unsigned int irq)
         if (!gpio_irq_mask[t])
             __intc_mask_irq(IRQ_GPIO0 - t);
     }
-    else if ((irq >= IRQ_DMA_0) && (irq <= IRQ_DMA_0 + NUM_DMA))
+    else if ((irq >= IRQ_DMA_0) && (irq < IRQ_DMA_0 + NUM_DMA))
     {
         __dmac_channel_disable_irq(irq - IRQ_DMA_0);
         dma_irq_mask &= ~(1 << (irq - IRQ_DMA_0));