diff --git a/src/sbbs3/ntsvcs.h b/src/sbbs3/ntsvcs.h
index f2ff6baa292cc192e4703eadf2aaa549002108be..9629ccf7a13af0f6071de7adda42f92fc2c4f00c 100644
--- a/src/sbbs3/ntsvcs.h
+++ b/src/sbbs3/ntsvcs.h
@@ -45,4 +45,6 @@
 #define NTSVC_NAME_MAIL		"SynchronetMail"
 #define NTSVC_NAME_SERVICES "SynchronetServices"
 
+#define SERVICE_CONTROL_RECYCLE	128	/* User-defined control code */
+
 #endif	/* Don't add anything after this line */
\ No newline at end of file