diff --git a/configs/boston32r6el_defconfig b/configs/boston32r6el_defconfig
index 2a2169f..8ae2f23 100644
--- a/configs/boston32r6el_defconfig
+++ b/configs/boston32r6el_defconfig
@@ -23,6 +23,7 @@
 CONFIG_SYS_PROMPT="boston # "
 CONFIG_SYS_CBSIZE=256
 CONFIG_SYS_PBSIZE=282
+CONFIG_SYS_BOOTM_LEN=0x4000000
 # CONFIG_CMD_ELF is not set
 CONFIG_CMD_GREPENV=y
 CONFIG_CMD_MEMTEST=y