diff --git a/libraries/wutnewlib/CMakeLists.txt b/libraries/wutnewlib/CMakeLists.txt
index 6ae8885..0fd4391 100644
--- a/libraries/wutnewlib/CMakeLists.txt
+++ b/libraries/wutnewlib/CMakeLists.txt
@@ -5,6 +5,7 @@ set_property(SOURCE crt0.s PROPERTY LANGUAGE C)
 
 add_library(wutnewlib
    crt0.s
+   sleep.c
    syscalls.c)
 target_include_directories(wutnewlib PRIVATE "${WUT_ROOT}/include")
 
diff --git a/libraries/wutnewlib/sleep.c b/libraries/wutnewlib/sleep.c
new file mode 100644
index 0000000..7dd1b23
--- /dev/null
+++ b/libraries/wutnewlib/sleep.c
@@ -0,0 +1,14 @@
+#include <coreinit/thread.h>
+#include <coreinit/systeminfo.h>
+#include <coreinit/time.h>
+#include <unistd.h>
+
+unsigned sleep(unsigned seconds) {
+   OSSleepTicks(OSSeconds(seconds));
+   return 0;
+}
+
+int usleep(useconds_t microseconds) {
+   OSSleepTicks(OSMicroseconds(microseconds));
+   return 0;
+}