diff --git a/libupgrade/hmx_upgrade_nvram.c b/libupgrade/hmx_upgrade_nvram.c
index 3797f13..91cf33f 100644
--- a/libupgrade/hmx_upgrade_nvram.c
+++ b/libupgrade/hmx_upgrade_nvram.c
@@ -68,8 +68,8 @@
 #define get8bit(q) (unsigned char)((q)[0])
 #define get32bit(q) (unsigned int)(((*(unsigned char *)(q)) << 24) | (*((unsigned char *)(q)+1) << 16) | (*((unsigned char *)(q)+2) << 8) | (*((unsigned char *)(q)+3)) )
 
-#define DEBUG_ERR printf
-#define DEBUG_INFO printf
+#define DEBUG_ERR(fmt, args...) fprintf(stderr, fmt, #args)
+#define DEBUG_INFO(fmt, args...) fprintf(stderr, fmt, #args)
 #define UNUSED(x) (void)(x)
 
 #define MAX_NVRAM_FILENAME_LENGTH	32
@@ -650,17 +650,17 @@
 	drv_error  = drv_NVRAM_LoadByAddress(partition, s_nvram_offset[partition], s_nvram_size[partition]);
 	if (drv_error != DRV_OK)
 	{
-		printf("[HMX_NVRAM_Load] error(%d) loading partition (%d)\n", drv_error, partition);
+		DEBUG_ERR("[HMX_NVRAM_Load] error(%d) loading partition (%d)\n", drv_error, partition);
 		if (s_nvram_backup_offset[partition] != 0)
 		{
 			drv_error  = drv_NVRAM_LoadByAddress(partition, s_nvram_backup_offset[partition], s_nvram_size[partition]);
 			if (drv_error != DRV_OK)
 			{
-				printf("[HMX_NVRAM_Load] error(%d) loading backup partition (%d)\n", drv_error, partition);
+				DEBUG_ERR("[HMX_NVRAM_Load] error(%d) loading backup partition (%d)\n", drv_error, partition);
 			}
 			else
 			{
-				printf("[HMX_NVRAM_Load] load OK loading backup partition (%d)\n", partition);
+				DEBUG_INFO("[HMX_NVRAM_Load] load OK loading backup partition (%d)\n", partition);
 			}
 		}
 	}