diff --git a/components/libc/compilers/armlibc/syscalls.c b/components/libc/compilers/armlibc/syscalls.c
index 3b1627d82a8220433dd828b03d013b13e9b6d3f4..ccdcfc86ea3341cf9d6d72689a2e95438c93cc25 100644
--- a/components/libc/compilers/armlibc/syscalls.c
+++ b/components/libc/compilers/armlibc/syscalls.c
@@ -336,7 +336,13 @@ int fgetc(FILE *f)
 #ifdef RT_USING_POSIX
     char ch;
 
-    if (libc_stdio_read(&ch, 1) == 1)
+    if (libc_stdio_get_console() < 0)
+    {
+        LOG_W("Do not invoke standard output before initializing libc");
+        return -1;
+    }
+
+    if(read(STDIN_FILENO, &ch, 1) == 1)
         return ch;
 #endif