diff --git a/components/libc/compilers/minilibc/time.c b/components/libc/compilers/minilibc/time.c
index 6f551dda31..605f6f573e 100644
--- a/components/libc/compilers/minilibc/time.c
+++ b/components/libc/compilers/minilibc/time.c
@@ -1,4 +1,5 @@
 #include <time.h>
+#include <rtthread.h>
 
 /* days per month -- nonleap! */
 const short __spm[13] =