diff --git a/src/system/boot/arch/arm/arch_mailbox_bcm2835.cpp b/src/system/boot/arch/arm/arch_mailbox_bcm2835.cpp
index fa0abb64cc..42f5764205 100644
--- a/src/system/boot/arch/arm/arch_mailbox_bcm2835.cpp
+++ b/src/system/boot/arch/arm/arch_mailbox_bcm2835.cpp
@@ -79,7 +79,7 @@ ArchMailboxArmBCM2835::Read(uint8 channel, uint32& value)
 inline auto&
 ArchMailboxArmBCM2835::GetRegister(unsigned reg)
 {
-	auto addr = fBase + ARM_CTRL_0_MAILBOX_BASE + reg;
+	auto addr = fBase + reg;
 	return *reinterpret_cast<std::atomic<uint32_t>*>(addr);
 }
 
diff --git a/src/system/boot/platform/u-boot/arch/arm/arch_mailbox.cpp b/src/system/boot/platform/u-boot/arch/arm/arch_mailbox.cpp
index 81eeab0c17..418dffc5dc 100644
--- a/src/system/boot/platform/u-boot/arch/arm/arch_mailbox.cpp
+++ b/src/system/boot/platform/u-boot/arch/arm/arch_mailbox.cpp
@@ -20,7 +20,7 @@ arch_mailbox_init()
 {
 	#if defined(BOARD_CPU_BCM2835) || defined(BOARD_CPU_BCM2836)
 	extern ArchMailbox *arch_get_mailbox_arm_bcm2835(addr_t base);
-	gMailbox = arch_get_mailbox_arm_bcm2835(DEVICE_BASE);
+	gMailbox = arch_get_mailbox_arm_bcm2835(DEVICE_BASE + ARM_CTRL_0_MAILBOX_BASE);
 	#endif
 	return B_OK;
 }