diff --git a/kal/libc/newlib/porting/include/sys/fcntl.h b/kal/libc/newlib/porting/include/sys/fcntl.h
index 8ecae833..3a823619 100644
--- a/kal/libc/newlib/porting/include/sys/fcntl.h
+++ b/kal/libc/newlib/porting/include/sys/fcntl.h
@@ -35,4 +35,10 @@
 
 #define O_NDELAY    _FNDELAY
 
+#ifdef __riscv
+#ifndef O_CLOEXEC
+#define O_CLOEXEC  02000000
+#endif
+#endif /* __riscv */
+
 #endif /* !_ADAPT_SYS_FCNTL_H */
diff --git a/kal/libc/newlib/porting/include/time.h b/kal/libc/newlib/porting/include/time.h
index b1659482..9632d6c8 100644
--- a/kal/libc/newlib/porting/include/time.h
+++ b/kal/libc/newlib/porting/include/time.h
@@ -37,4 +37,38 @@
 
 #include_next <time.h>
 
+#ifdef __riscv
+#ifndef CLOCK_MONOTONIC_RAW
+#define CLOCK_MONOTONIC_RAW     12
+#endif
+
+#ifndef CLOCK_REALTIME_COARSE
+#define CLOCK_REALTIME_COARSE    5
+#endif
+
+#ifndef CLOCK_MONOTONIC_COARSE
+#define CLOCK_MONOTONIC_COARSE   6
+#endif
+
+#ifndef CLOCK_BOOTTIME
+#define CLOCK_BOOTTIME           7
+#endif
+
+#ifndef CLOCK_REALTIME_ALARM
+#define CLOCK_REALTIME_ALARM     8
+#endif
+
+#ifndef CLOCK_BOOTTIME_ALARM
+#define CLOCK_BOOTTIME_ALARM     9
+#endif
+
+#ifndef CLOCK_SGI_CYCLE
+#define CLOCK_SGI_CYCLE         10
+#endif
+
+#ifndef CLOCK_TAI
+#define CLOCK_TAI               11
+#endif
+#endif /* __riscv */
+
 #endif /* !_ADAPT_TIME_H */