diff --git a/arch/risc-v/risc-v3a/rv32i/gcc/port_s.S b/arch/risc-v/risc-v3a/rv32i/gcc/port_s.S
index 2a1ba9ff..02a3c88f 100644
--- a/arch/risc-v/risc-v3a/rv32i/gcc/port_s.S
+++ b/arch/risc-v/risc-v3a/rv32i/gcc/port_s.S
@@ -143,8 +143,8 @@ restore_context:
 
 /* just switch at Software interrupt */
 .align 2
-.global SW_handler
-SW_handler:
+.global SW_Handler
+SW_Handler:
 #if ARCH_RISCV_FPU
 	addi sp, sp, -128
 	fsw  f0,  __reg_f0_OFFSET(sp)
diff --git a/board/TencentOS_Tiny_CH32V307_EVB/Startup/startup_ch32v30x.S b/board/TencentOS_Tiny_CH32V307_EVB/Startup/startup_ch32v30x.S
index 33bbe01f..f833ee0e 100644
--- a/board/TencentOS_Tiny_CH32V307_EVB/Startup/startup_ch32v30x.S
+++ b/board/TencentOS_Tiny_CH32V307_EVB/Startup/startup_ch32v30x.S
@@ -42,7 +42,7 @@ _vector_base:
     .word   0
     .word   SysTick_Handler            /* SysTick */
     .word   0
-    .word   SW_handler                 /* SW */
+    .word   SW_Handler                 /* SW */
     .word   0
     /* External Interrupts */
     .word   WWDG_IRQHandler            /* Window Watchdog */
@@ -143,7 +143,7 @@ _vector_base:
     .weak   Ecall_U_Mode_Handler       /* Ecall U Mode */
     .weak   Break_Point_Handler        /* Break Point */
     .weak   SysTick_Handler            /* SysTick */
-    .weak   SW_handler                 /* SW */
+    .weak   SW_Handler                 /* SW */
     .weak   WWDG_IRQHandler            /* Window Watchdog */
     .weak   PVD_IRQHandler             /* PVD through EXTI Line detect */
     .weak   TAMPER_IRQHandler          /* TAMPER */
@@ -239,7 +239,7 @@ Ecall_M_Mode_Handler:  1:  j 1b
 Ecall_U_Mode_Handler:  1:  j 1b
 Break_Point_Handler:  1:  j 1b
 SysTick_Handler:  1:  j 1b
-SW_handler:  1:  j 1b
+SW_Handler:  1:  j 1b
 WWDG_IRQHandler:  1:  j 1b
 PVD_IRQHandler:  1:  j 1b
 TAMPER_IRQHandler:  1:  j 1b