diff --git a/components/finsh/shell.h b/components/finsh/shell.h
index 751590366..92fa4bccb 100644
--- a/components/finsh/shell.h
+++ b/components/finsh/shell.h
@@ -50,9 +50,7 @@
 #ifndef FINSH_THREAD_STACK_SIZE
 #define FINSH_THREAD_STACK_SIZE 2048
 #endif
-#ifndef FINSH_CMD_SIZE
 #define FINSH_CMD_SIZE		80
-#endif
 
 #define FINSH_OPTION_ECHO	0x01
 #if defined(FINSH_USING_MSH) || (defined(RT_USING_DFS) && defined(DFS_USING_WORKDIR))