diff --git a/include/configs/hi-common.h b/include/configs/hi-common.h
index c46a950..784ba0c 100644
--- a/include/configs/hi-common.h
+++ b/include/configs/hi-common.h
@@ -52,7 +52,9 @@
 #define CONFIG_SYS_HUSH_PARSER 1 
 #define CONFIG_SYS_PROMPT_HUSH_PS2 " > "
 
+#ifndef CONFIG_SYS_MALLOC_LEN
 #define CONFIG_SYS_MALLOC_LEN      (CONFIG_ENV_SIZE + 512*1024)
+#endif
 #define CONFIG_CMD_MTDPARTS 1
 #define CONFIG_RBTREE 1
 #define CONFIG_MTD_DEVICE 1
diff --git a/include/configs/hi3516av200.h b/include/configs/hi3516av200.h
index 87d9680..fac5730 100644
--- a/include/configs/hi3516av200.h
+++ b/include/configs/hi3516av200.h
@@ -101,7 +101,7 @@
 #define FMC_TEXT_ADRS			(FMC_MEM_BASE)
 
 #define MEM_BASE_DDR			(DDR_MEM_BASE)
-#define CONFIG_SYS_MALLOC_LEN      (CONFIG_ENV_SIZE + 128*1024)
+#define CONFIG_SYS_MALLOC_LEN      (CONFIG_ENV_SIZE + 2*1024*1024)
 /* size in bytes reserved for initial data */
 #define CONFIG_SYS_GBL_DATA_SIZE   128
 
diff --git a/include/configs/hi3519v101.h b/include/configs/hi3519v101.h
index 978a72d..0b3074b 100644
--- a/include/configs/hi3519v101.h
+++ b/include/configs/hi3519v101.h
@@ -102,7 +102,7 @@
 #define FMC_TEXT_ADRS			(FMC_MEM_BASE)
 
 #define MEM_BASE_DDR			(DDR_MEM_BASE)
-#define CONFIG_SYS_MALLOC_LEN      (CONFIG_ENV_SIZE + 128*1024)
+#define CONFIG_SYS_MALLOC_LEN      (CONFIG_ENV_SIZE + 2*1024*1024)
 /* size in bytes reserved for initial data */
 #define CONFIG_SYS_GBL_DATA_SIZE   128