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