diff --git a/spectrum/src/win32/ServiceWrapper.h b/spectrum/src/win32/ServiceWrapper.h
index 9ee2fb0def5d8e0284934cda18387f6b832dad05..aa6bce4116037fb6d7a18089751c70ba98d7d963 100644
--- a/spectrum/src/win32/ServiceWrapper.h
+++ b/spectrum/src/win32/ServiceWrapper.h
@@ -15,5 +15,5 @@ public:
 };
 
 int mainloop();
-void stop();
+BOOL spectrum_control_handler( DWORD fdwCtrlType );