diff --git a/include/configs/mx51evk.h b/include/configs/mx51evk.h
index 8da8222..50caacd 100644
--- a/include/configs/mx51evk.h
+++ b/include/configs/mx51evk.h
@@ -224,4 +224,7 @@
 #define CONFIG_ENV_IS_IN_MMC
 #define CONFIG_SYS_MMC_ENV_DEV 0
 
+#define CONFIG_OF_LIBFDT
+#define CONFIG_SYS_BOOTMAPSZ   0x800000
+
 #endif
diff --git a/include/configs/mx53evk.h b/include/configs/mx53evk.h
index f2a5752..6ac910b 100644
--- a/include/configs/mx53evk.h
+++ b/include/configs/mx53evk.h
@@ -190,4 +190,7 @@
 #define CONFIG_ENV_IS_IN_MMC
 #define CONFIG_SYS_MMC_ENV_DEV 0
 
+#define CONFIG_OF_LIBFDT
+#define CONFIG_SYS_BOOTMAPSZ   0x800000
+
 #endif				/* __CONFIG_H */