diff --git a/source/windows/utility.hpp b/source/windows/utility.hpp
index e0c1760..799d639 100644
--- a/source/windows/utility.hpp
+++ b/source/windows/utility.hpp
@@ -50,6 +50,13 @@ namespace datapath {
 				return converter.from_bytes(string);
 			}
 
+			static VOID CALLBACK def_io_completion_routine(_In_ DWORD dwErrorCode,
+				_In_ DWORD dwNumberOfBytesTransfered,
+				_Inout_ LPOVERLAPPED lpOverlapped)
+			{
+
+			}
+
 		} // namespace utility
 	}         // namespace windows
 } // namespace datapath