diff --git a/ulib/system/system.c b/ulib/system/system.c
index 7da9c67..b954d67 100644
--- a/ulib/system/system.c
+++ b/ulib/system/system.c
@@ -39,3 +39,7 @@ int32_t schedrelease(void) {
 int32_t devctl(Dev_t *devh, uint64_t cmd, uint8_t *buffer, size_t len, uint64_t extra) {
   return syscall(SYS_DEVCTL, (uint64_t)devh, cmd, (uint64_t)buffer, (uint64_t)len, (uint64_t)extra, 0);
 }
+
+int32_t rand(void) {
+  return syscall(SYS_RAND, 0, 0, 0, 0, 0, 0);
+}
diff --git a/ulib/system/system.h b/ulib/system/system.h
index c48f6b4..1d7a611 100644
--- a/ulib/system/system.h
+++ b/ulib/system/system.h
@@ -13,5 +13,6 @@ int32_t mman_map(uint8_t *addr, size_t size, uint64_t prot, uint64_t flags, uint
 int32_t mman_unmap(uint8_t *addr);
 int32_t schedrelease(void);
 int32_t devctl(Dev_t *devh, uint64_t cmd, uint8_t *buffer, size_t len, uint64_t extra);
+int32_t rand(void);
 
 #endif // ULIB_SYSTEM_SYSTEM_H_