diff --git a/configs/P5040DS_defconfig b/configs/P5040DS_defconfig
index 8d5f107..44abf8f 100644
--- a/configs/P5040DS_defconfig
+++ b/configs/P5040DS_defconfig
@@ -8,6 +8,7 @@
 CONFIG_MPC85xx=y
 CONFIG_TARGET_P5040DS=y
 CONFIG_MPC85XX_HAVE_RESET_VECTOR=y
+CONFIG_ENABLE_36BIT_PHYS=y
 CONFIG_MP=y
 CONFIG_FIT=y
 CONFIG_FIT_VERBOSE=y