diff --git a/include/dplay8.h b/include/dplay8.h
index cb797c606c4..8aab0f27fd6 100644
--- a/include/dplay8.h
+++ b/include/dplay8.h
@@ -94,6 +94,7 @@ typedef	DWORD	DPNHANDLE, *PDPNHANDLE;
 #define DPNERR_CONVERSION               MAKE_DPNHRESULT(0x170)
 #define DPNERR_DATATOOLARGE             MAKE_DPNHRESULT(0x175)
 #define DPNERR_DOESNOTEXIST             MAKE_DPNHRESULT(0x180)
+#define DPNERR_DPNSVRNOTAVAILABLE       MAKE_DPNHRESULT(0x185)
 #define DPNERR_DUPLICATECOMMAND         MAKE_DPNHRESULT(0x190)
 #define DPNERR_ENDPOINTNOTRECEIVING     MAKE_DPNHRESULT(0x200)
 #define DPNERR_ENUMQUERYTOOLARGE        MAKE_DPNHRESULT(0x210)