diff --git a/SigIntHelper.cs b/SigIntHelper.cs
index 13a7db4..3d770b9 100644
--- a/SigIntHelper.cs
+++ b/SigIntHelper.cs
@@ -49,7 +49,7 @@ namespace winsw
                 SetConsoleCtrlHandler(null, true);
                 GenerateConsoleCtrlEvent(CtrlTypes.CTRL_C_EVENT, 0);
 
-                process.WaitForExit(shutdownTimeout.TotalMilliseconds);
+                process.WaitForExit((int)shutdownTimeout.TotalMilliseconds);
 
                 return process.HasExited;
             }