diff --git a/dcc/dn_dcc_proto.h b/dcc/dn_dcc_proto.h
index 1774ddf..782cf3a 100644
--- a/dcc/dn_dcc_proto.h
+++ b/dcc/dn_dcc_proto.h
@@ -114,16 +114,16 @@ typedef struct {
 #define DCC_READ_ERROR     0x28 // Read error
 #define DCC_W_ASSERT_ERROR 0x2A // Ready flag timeout during write
 #define DCC_E_ASSERT_ERROR 0x2B // Ready flag timeout during erase
-#define DCC_ROFS_ERROR     0x2D // Cannot write to read-only memory
+#define DCC_WPROT_ERROR    0x2D // Cannot write to read only memory
 #define DCC_E_UNK_ERROR    0x2E // Unknown erase error, Please file a bug report
 #define DCC_WUPROT_TIMEOUT 0x2F // Write unprotect timeout
-#define DCC_WUPROT_ERROR   0x30 // Write unprotect failed, Attempted to write unprotect the block but still write protected afterwards.
+#define DCC_WUPROT_ERROR   0x30 // Write unprotect error
 #define DCC_W_UNK_ERROR    0x31 // Unknown write error, Please file a bug report
 #define DCC_UNK_ERROR      0x32 // Unknown error, may happen if the flash is not completely initialized.
 #define DCC_FLASH_NOENT    0x37 // Flash with this ID is not probed/not found
-#define DCC_WPROT_ERROR    0x3C // Read-only memory or Write/Erase routines not implemented
+#define DCC_ROFS_ERROR     0x3C // Read-only memory or Write/Erase routines not implemented
 #define DCC_NOMEM_ERROR    0x3D // Not enough memory
-#define DCC_E_INSUFF_DATA  0x3E // Insufficient data
+#define DCC_E_INSUFF_DATA  0x3E // Insufficient data is received
 
 // Functions
 // 01 - Compress
diff --git a/main.c b/main.c
index 4694226..761e893 100644
--- a/main.c
+++ b/main.c
@@ -241,7 +241,7 @@ void dcc_main(uint32_t StartAddress, uint32_t PageSize) {
 
                 if (fbFlashIndex < 0x11 && dev_mem[fbFlashIndex - 1].type != MEMTYPE_NONE) {
                     // TODO: Erasing
-                    DN_Packet_Send_One(CMD_WRITE_ERASE_STATUS(DCC_WPROT_ERROR, fbFlashIndex));
+                    DN_Packet_Send_One(CMD_WRITE_ERASE_STATUS(DCC_ROFS_ERROR, fbFlashIndex));
                 } else {
                     DN_Packet_Send_One(CMD_WRITE_ERASE_STATUS(DCC_FLASH_NOENT, fbFlashIndex));
                 }
@@ -281,7 +281,7 @@ void dcc_main(uint32_t StartAddress, uint32_t PageSize) {
                         continue;
                     }
                     // TODO: Writing
-                    DN_Packet_Send_One(CMD_WRITE_ERASE_STATUS(DCC_WPROT_ERROR, fbFlashIndex));
+                    DN_Packet_Send_One(CMD_WRITE_ERASE_STATUS(DCC_ROFS_ERROR, fbFlashIndex));
                 } else {
                     DN_Packet_Send_One(CMD_WRITE_ERASE_STATUS(DCC_FLASH_NOENT, fbFlashIndex));
                 }