diff --git a/Makefile b/Makefile
index 0fbaf7c..46d74b7 100644
--- a/Makefile
+++ b/Makefile
@@ -144,6 +144,7 @@ UPROGS=\
 	$U/_mkdir\
 	$U/_rm\
 	$U/_sh\
+	$U/_sleep\
 	$U/_stressfs\
 	$U/_usertests\
 	$U/_grind\
diff --git a/user/sleep.c b/user/sleep.c
new file mode 100644
index 0000000..4e9ebca
--- /dev/null
+++ b/user/sleep.c
@@ -0,0 +1,16 @@
+#include "kernel/types.h"
+#include "user/user.h"
+
+int
+main(int argc, char *argv[])
+{
+
+  if (argc != 2) {
+    fprintf(2, "Usage: sleep ticks...\n");
+    exit(1);
+  }
+
+  sleep(atoi(argv[1]));
+
+  exit(0);
+}