diff --git a/components/libc/compilers/armlibc/sys/unistd.h b/components/libc/compilers/armlibc/sys/unistd.h
index 73a73a267e..e1a1ad92f4 100644
--- a/components/libc/compilers/armlibc/sys/unistd.h
+++ b/components/libc/compilers/armlibc/sys/unistd.h
@@ -73,4 +73,7 @@ char *  ttyname     (int desc);
 unsigned int sleep(unsigned int seconds);
 int usleep(useconds_t usec);
 
+uid_t getuid(void);
+pid_t getpid(void);
+
 #endif /* _SYS_UNISTD_H */
diff --git a/components/libc/compilers/common/unistd.c b/components/libc/compilers/common/unistd.c
index 48e6beee4e..c7ad654da7 100644
--- a/components/libc/compilers/common/unistd.c
+++ b/components/libc/compilers/common/unistd.c
@@ -49,3 +49,15 @@ int usleep(useconds_t usec)
     return 0;
 }
 RTM_EXPORT(usleep);
+
+uid_t getuid(void)
+{
+    return -1;
+}
+RTM_EXPORT(getuid);
+
+pid_t getpid(void)
+{
+    return -1;
+}
+RTM_EXPORT(getuid);
diff --git a/components/libc/compilers/dlib/sys/unistd.h b/components/libc/compilers/dlib/sys/unistd.h
index 6d99cd6c55..5ca56ad136 100644
--- a/components/libc/compilers/dlib/sys/unistd.h
+++ b/components/libc/compilers/dlib/sys/unistd.h
@@ -47,4 +47,7 @@ char *  ttyname     (int desc);
 unsigned int sleep(unsigned int seconds);
 int usleep(useconds_t usec);
 
+uid_t getuid(void);
+pid_t getpid(void);
+
 #endif /* _SYS_UNISTD_H */