diff --git a/time.cpp b/time.cpp
index d6867574..90ff6dc7 100644
--- a/time.cpp
+++ b/time.cpp
@@ -37,6 +37,14 @@ util::nanoseconds (void) {
 
     return ((double)count.QuadPart / freq.QuadPart) * 1000000000UL;
 }
+
+
+void
+util::sleep (uint64_t ns) {
+    static const uint64_t ns_in_ms = 1000000;
+    Sleep (ns / ns_in_ms);
+}
+
 #else
 
 #include <ctime>