diff --git a/include/configs/microblaze-generic.h b/include/configs/microblaze-generic.h
index 2cfcace7b0..72550113ce 100644
--- a/include/configs/microblaze-generic.h
+++ b/include/configs/microblaze-generic.h
@@ -171,7 +171,6 @@
 
 #define CONFIG_SYS_FDT_BASE		(CONFIG_SYS_FLASH_BASE + \
 					 0x40000)
-#define CONFIG_SYS_FDT_SIZE		(16 << 10)
 #define CONFIG_SYS_SPL_ARGS_ADDR	(CONFIG_SYS_TEXT_BASE + \
 					 0x1000000)
 
diff --git a/scripts/config_whitelist.txt b/scripts/config_whitelist.txt
index 0aabe7a451..8b4fcba395 100644
--- a/scripts/config_whitelist.txt
+++ b/scripts/config_whitelist.txt
@@ -2170,7 +2170,6 @@ CONFIG_SYS_FCC_PSMR
 CONFIG_SYS_FDT_BASE
 CONFIG_SYS_FDT_LOAD_ADDR
 CONFIG_SYS_FDT_PAD
-CONFIG_SYS_FDT_SIZE
 CONFIG_SYS_FEC0_IOBASE
 CONFIG_SYS_FEC1_IOBASE
 CONFIG_SYS_FECI2C