diff --git a/arch/arm/mach-shmobile/board-ap4evb.c b/arch/arm/mach-shmobile/board-ap4evb.c
index 714955e8b313..d4cc2dec5734 100644
--- a/arch/arm/mach-shmobile/board-ap4evb.c
+++ b/arch/arm/mach-shmobile/board-ap4evb.c
@@ -579,7 +579,8 @@ static const struct fb_videomode ap4evb_lcdc_modes[] = {
 #endif
 	},
 };
-static struct sh_mobile_meram_cfg lcd_meram_cfg = {
+
+static const struct sh_mobile_meram_cfg lcd_meram_cfg = {
 	.icb[0] = {
 		.meram_size     = 0x40,
 	},
@@ -856,7 +857,7 @@ static long ap4evb_clk_optimize(unsigned long target, unsigned long *best_freq,
 	return error;
 }
 
-static struct sh_mobile_meram_cfg hdmi_meram_cfg = {
+static const struct sh_mobile_meram_cfg hdmi_meram_cfg = {
 	.icb[0] = {
 		.meram_size     = 0x100,
 	},
diff --git a/arch/arm/mach-shmobile/board-mackerel.c b/arch/arm/mach-shmobile/board-mackerel.c
index a6ad4a4bd6f7..e761b280a602 100644
--- a/arch/arm/mach-shmobile/board-mackerel.c
+++ b/arch/arm/mach-shmobile/board-mackerel.c
@@ -369,7 +369,7 @@ static int mackerel_get_brightness(void)
 	return gpio_get_value(GPIO_PORT31);
 }
 
-static struct sh_mobile_meram_cfg lcd_meram_cfg = {
+static const struct sh_mobile_meram_cfg lcd_meram_cfg = {
 	.icb[0] = {
 		.meram_size     = 0x40,
 	},
@@ -455,7 +455,7 @@ static struct platform_device hdmi_device = {
 	},
 };
 
-static struct sh_mobile_meram_cfg hdmi_meram_cfg = {
+static const struct sh_mobile_meram_cfg hdmi_meram_cfg = {
 	.icb[0] = {
 		.meram_size     = 0x100,
 	},