diff --git a/hw/char/exynos4210_uart.c b/hw/char/exynos4210_uart.c
index b75f28d473..bff706ab3a 100644
--- a/hw/char/exynos4210_uart.c
+++ b/hw/char/exynos4210_uart.c
@@ -102,7 +102,7 @@ typedef struct Exynos4210UartReg {
     uint32_t            reset_value;
 } Exynos4210UartReg;
 
-static Exynos4210UartReg exynos4210_uart_regs[] = {
+static const Exynos4210UartReg exynos4210_uart_regs[] = {
     {"ULCON",    ULCON,    0x00000000},
     {"UCON",     UCON,     0x00003000},
     {"UFCON",    UFCON,    0x00000000},
@@ -220,7 +220,7 @@ static uint8_t fifo_retrieve(Exynos4210UartFIFO *q)
     return  ret;
 }
 
-static int fifo_elements_number(Exynos4210UartFIFO *q)
+static int fifo_elements_number(const Exynos4210UartFIFO *q)
 {
     if (q->sp < q->rp) {
         return q->size - q->rp + q->sp;
@@ -229,7 +229,7 @@ static int fifo_elements_number(Exynos4210UartFIFO *q)
     return q->sp - q->rp;
 }
 
-static int fifo_empty_elements_number(Exynos4210UartFIFO *q)
+static int fifo_empty_elements_number(const Exynos4210UartFIFO *q)
 {
     return q->size - fifo_elements_number(q);
 }
@@ -245,7 +245,7 @@ static void fifo_reset(Exynos4210UartFIFO *q)
     q->rp = 0;
 }
 
-static uint32_t exynos4210_uart_Tx_FIFO_trigger_level(Exynos4210UartState *s)
+static uint32_t exynos4210_uart_Tx_FIFO_trigger_level(const Exynos4210UartState *s)
 {
     uint32_t level = 0;
     uint32_t reg;