diff --git a/libdevcore/TransientDirectory.cpp b/libdevcore/TransientDirectory.cpp
index 3e5462700..3c88e42a3 100644
--- a/libdevcore/TransientDirectory.cpp
+++ b/libdevcore/TransientDirectory.cpp
@@ -52,7 +52,7 @@ TransientDirectory::~TransientDirectory()
 		}
 		catch (...)
 		{
-			std::this_thread::sleep_for(chrono::milliseconds(10));
+			this_thread::sleep_for(chrono::milliseconds(10));
 		}
 	}
 }