diff --git a/firmware/export/jz4740.h b/firmware/export/jz4740.h
index 379c9f8aaa..354379a950 100644
--- a/firmware/export/jz4740.h
+++ b/firmware/export/jz4740.h
@@ -4986,6 +4986,7 @@ do{                                 \
 #define IPU_V_BASE  0xB3080000
 #define IPU__SIZE   0x00001000
 
+#ifndef __ASSEMBLY__
 struct ipu_module
 {
     unsigned int reg_ctrl;             // 0x0
@@ -5022,7 +5023,7 @@ struct Ration2m
     float ratio;
     int n, m;
 };
-
+#endif /* !__ASSEMBLY__ */
 
 // Register offset
 #define  REG_CTRL           0x0
diff --git a/firmware/target/mips/ingenic_jz47xx/system-jz4760.c b/firmware/target/mips/ingenic_jz47xx/system-jz4760.c
index ef99048812..3a1321b992 100644
--- a/firmware/target/mips/ingenic_jz47xx/system-jz4760.c
+++ b/firmware/target/mips/ingenic_jz47xx/system-jz4760.c
@@ -533,7 +533,7 @@ static void serial_setbrg(void)
     *uart_lcr = tmp;
 }
 
-static int serial_preinit(void);
+static int serial_preinit(void)
 {
     volatile u8 *uart_fcr = (volatile u8 *)(CFG_UART_BASE + OFF_FCR);
     volatile u8 *uart_lcr = (volatile u8 *)(CFG_UART_BASE + OFF_LCR);