diff --git a/include/configs/rk3066_common.h b/include/configs/rk3066_common.h
index 94d2ebb7e1..7dff0ecf56 100644
--- a/include/configs/rk3066_common.h
+++ b/include/configs/rk3066_common.h
@@ -13,7 +13,7 @@
 #define CONFIG_SKIP_LOWLEVEL_INIT_ONLY
 #define CONFIG_SYS_MAXARGS		16
 #define CONFIG_BAUDRATE			115200
-#define CONFIG_SYS_MALLOC_LEN		(64 << 20)
+#define CONFIG_SYS_MALLOC_LEN		(32 << 20)
 #define CONFIG_SYS_CBSIZE		256
 
 #define CONFIG_SYS_SDRAM_BASE		0x60000000