diff --git a/src/runtime/time.go b/src/runtime/time.go
new file mode 100644
index 000000000..1043e3f10
--- /dev/null
+++ b/src/runtime/time.go
@@ -0,0 +1,20 @@
+
+package runtime
+
+// TODO: use the time package for this.
+
+// #include <unistd.h>
+import "C"
+
+type Duration uint64
+
+// Use microseconds as the smallest time unit
+const (
+	Microsecond = 1
+	Millisecond = Microsecond * 1000
+	Second      = Millisecond * 1000
+)
+
+func Sleep(d Duration) {
+	C.usleep(C.useconds_t(d))
+}