diff --git a/configs/boston64r6_defconfig b/configs/boston64r6_defconfig
index 216e61c..b0bbf51 100644
--- a/configs/boston64r6_defconfig
+++ b/configs/boston64r6_defconfig
@@ -16,6 +16,8 @@
 # CONFIG_CMD_ELF is not set
 CONFIG_CMD_GREPENV=y
 CONFIG_CMD_MEMTEST=y
+CONFIG_SYS_MEMTEST_START=0x80000000
+CONFIG_SYS_MEMTEST_END=0x90000000
 # CONFIG_CMD_LOADB is not set
 # CONFIG_CMD_LOADS is not set
 CONFIG_CMD_PCI=y