diff --git a/components/finsh/cmd.c b/components/finsh/cmd.c
index 8fd03e31262c15d088f423b38a33618edfe036d7..6e86d9214ab82d9ddb7b3135c836c19c22dadfde 100644
--- a/components/finsh/cmd.c
+++ b/components/finsh/cmd.c
@@ -55,7 +55,7 @@ long version(void)
 
     return 0;
 }
-MSH_CMD_EXPORT(version, show RT - Thread version information);
+MSH_CMD_EXPORT(version, show RT-Thread version information);
 
 rt_inline void object_split(int len)
 {
diff --git a/components/finsh/msh.c b/components/finsh/msh.c
index bb649549d408f2341a8d1f5bb8a59166344a1d55..5272f0728a443227b1a6ae78c1812350552dd1e4 100644
--- a/components/finsh/msh.c
+++ b/components/finsh/msh.c
@@ -52,7 +52,7 @@ int msh_help(int argc, char **argv)
 
     return 0;
 }
-MSH_CMD_EXPORT_ALIAS(msh_help, help, RT - Thread shell help.);
+MSH_CMD_EXPORT_ALIAS(msh_help, help, RT-Thread shell help.);
 
 #ifdef MSH_USING_BUILT_IN_COMMANDS
 int cmd_ps(int argc, char **argv)