diff --git a/librpc/idl/spoolss.idl b/librpc/idl/spoolss.idl
index 5d63b260781..2782c719944 100644
--- a/librpc/idl/spoolss.idl
+++ b/librpc/idl/spoolss.idl
@@ -3288,10 +3288,10 @@ cpp_quote("#define spoolss_security_descriptor security_descriptor")
 		GUID core_driver_guid;
 		NTTIME driver_date;
 		hyper driver_version;
-		[charset(UTF8)] uint8 formname[520];
+		[charset(UTF16)] uint16 szPackageID[260];
 	} spoolss_CorePrinterDriver;
 
-	[public] WERROR spoolss_GetCorePrinterDrivers(
+	[public] HRESULT spoolss_GetCorePrinterDrivers(
 		[in,unique] [string,charset(UTF16)] uint16 *servername,
 		[in,ref] [string,charset(UTF16)] uint16 *architecture,
 		[in] uint32 core_driver_size,
diff --git a/source3/rpc_server/spoolss/srv_spoolss_nt.c b/source3/rpc_server/spoolss/srv_spoolss_nt.c
index 2778ba8ca87..9c82600e72e 100644
--- a/source3/rpc_server/spoolss/srv_spoolss_nt.c
+++ b/source3/rpc_server/spoolss/srv_spoolss_nt.c
@@ -11177,11 +11177,11 @@ WERROR _spoolss_65(struct pipes_struct *p,
  _spoolss_GetCorePrinterDrivers
 ****************************************************************/
 
-WERROR _spoolss_GetCorePrinterDrivers(struct pipes_struct *p,
-				      struct spoolss_GetCorePrinterDrivers *r)
+HRESULT _spoolss_GetCorePrinterDrivers(struct pipes_struct *p,
+				       struct spoolss_GetCorePrinterDrivers *r)
 {
 	p->fault_state = DCERPC_FAULT_OP_RNG_ERROR;
-	return WERR_NOT_SUPPORTED;
+	return HRES_ERROR_NOT_SUPPORTED;
 }
 
 /****************************************************************