diff --git a/arch/arm/mach-stm32/soc.c b/arch/arm/mach-stm32/soc.c
index 6ae31d3..41338a1 100644
--- a/arch/arm/mach-stm32/soc.c
+++ b/arch/arm/mach-stm32/soc.c
@@ -18,7 +18,7 @@
 		 */
 #if defined(CONFIG_STM32F4)
 		{ 0x00000000, REGION_0, XN_DIS, PRIV_RW_USR_RW,
-		O_I_WB_RD_WR_ALLOC, REGION_16MB },
+		O_I_WB_RD_WR_ALLOC, REGION_512MB },
 #endif
 
 		{ 0x90000000, REGION_1, XN_DIS, PRIV_RW_USR_RW,