diff --git a/components/libc/compilers/minilibc/sys/types.h b/components/libc/compilers/minilibc/sys/types.h
index 7f27de468f480d88bb0bde8d0d110ad875f11616..cdd17e600dedd10432065309719a29322b2e258c 100644
--- a/components/libc/compilers/minilibc/sys/types.h
+++ b/components/libc/compilers/minilibc/sys/types.h
@@ -15,6 +15,8 @@ typedef int mode_t;
 typedef unsigned long clockid_t;
 typedef int pid_t;
 
+typedef	unsigned long clock_t; /* clock() */
+
 #ifndef NULL
 #define NULL        (0)
 #endif
diff --git a/components/libc/compilers/minilibc/time.h b/components/libc/compilers/minilibc/time.h
index 2f8ad23c7173e01640eb10557c2083e1d4c0754f..d64feba0b8af639bb6eb92b4aa0febc7e5c9611d 100644
--- a/components/libc/compilers/minilibc/time.h
+++ b/components/libc/compilers/minilibc/time.h
@@ -3,4 +3,14 @@
 
 #include <sys/time.h>
 
+time_t mktime(struct tm * const t);
+
+char *asctime(const struct tm *timeptr);
+char *ctime(const time_t *timep);
+struct tm* localtime(const time_t* t);
+
+char *asctime_r(const struct tm *t, char *buf);
+struct tm *gmtime_r(const time_t *timep, struct tm *r);
+struct tm* localtime_r(const time_t* t, struct tm* r);
+
 #endif