diff --git a/src/utiltime.cpp b/src/utiltime.cpp
index 467d2553624..e926cf3811d 100644
--- a/src/utiltime.cpp
+++ b/src/utiltime.cpp
@@ -13,9 +13,13 @@
 #include <atomic>
 #include <boost/date_time/posix_time/posix_time.hpp>
 #include <boost/thread.hpp>
+#include <ctime>
+#include <thread>
 
 using namespace std;
 
+void UninterruptibleSleep(const std::chrono::microseconds& n) { std::this_thread::sleep_for(n); }
+
 static std::atomic<int64_t> nMockTime(0); //!< For testing
 
 int64_t GetTime()
diff --git a/src/utiltime.h b/src/utiltime.h
index 3fe1781a40c..cd8f2006887 100644
--- a/src/utiltime.h
+++ b/src/utiltime.h
@@ -9,6 +9,9 @@
 
 #include <stdint.h>
 #include <string>
+#include <chrono>
+
+void UninterruptibleSleep(const std::chrono::microseconds& n);
 
 /**
  * GetTimeMicros() and GetTimeMillis() both return the system time, but in