diff --git a/apps/shell/src/shcmd.c b/apps/shell/src/shcmd.c
index 06845ac8e3c409d9a2b9decaf083594a4a6918b0..737fd2430d025cd7afa891e90f9de82db4693ad4 100755
--- a/apps/shell/src/shcmd.c
+++ b/apps/shell/src/shcmd.c
@@ -453,6 +453,7 @@ unsigned int OsCmdKeyShift(const char *cmdKey, char *cmdOut, unsigned int size)
     free(outputBak);
     return SH_OK;
 }
+
 int OsTabCompletion(char *cmdKey, unsigned int *len)
 {
     int count;