--- a/cngpij/cngpij/bjcups.c
+++ a/cngpij/cngpij/bjcups.c
@@ -66,6 +66,27 @@
 
 char* g_printer_name = NULL;
 
+#if (CUPS_VERSION_MAJOR > 1) || (CUPS_VERSION_MINOR > 5)
+#define HAVE_CUPS_1_6 1
+#endif
+
+#ifndef HAVE_CUPS_1_6
+
+#define ippSetOperation(ipp_request, ipp_op_id) ipp_request->request.op.operation_id = ipp_op_id
+#define ippSetRequestId(ipp_request, ipp_rq_id) ipp_request->request.op.request_id = ipp_rq_id
+#define ippGetStatusCode(ipp_request) ipp_request->request.status.status_code
+#define ippFirstAttribute(ipp) ipp->attrs /* simplistic */
+#define bjcups_ippNextAttribute(resp, attr) attr->next
+#define ippGetGroupTag(attr)  attr->group_tag
+#define ippGetName(attr) attr->name
+#define ippGetString(attr, ind, lang) attr->values[ind].string.text
+#define ippGetValueTag(attr) attr->value_tag
+
+#else
+
+#define bjcups_ippNextAttribute(resp, attr) ippNextAttribute(resp)
+
+#endif
 
 extern int GetIPCData(LPIPCU pipc, char *sname);
 static short getDeviceURI( const char *pDestName, char *pDeviceURI, short bufSize);
@@ -698,8 +719,8 @@
 	else {
 		pRequest = ippNew();
 		
-		pRequest->request.op.operation_id = CUPS_GET_PRINTERS;
-		pRequest->request.op.request_id   = 1;
+		ippSetOperation(pRequest, CUPS_GET_PRINTERS);
+		ippSetRequestId(pRequest, 1);
 		
 		pLanguage = bjcupsLangDefault();	// cupsLangDefault() -> bjcupsLangDefault() for cups-1.1.19
 		
@@ -708,29 +729,29 @@
 		ippAddString(pRequest, IPP_TAG_OPERATION, IPP_TAG_URI, "printer-uri", NULL, NULL);
 		
 		if ((pResponse = cupsDoRequest(pHTTP, pRequest, "/")) != NULL) {
-			if (pResponse->request.status.status_code > IPP_OK_CONFLICT) {
+			if (ippGetStatusCode(pResponse) > IPP_OK_CONFLICT) {
 				fputs("ERROR: IPP ERROR\n", stderr);
 				goto onErr;
 			}
 			else {
-				pAttribute = pResponse->attrs;
+				pAttribute = ippFirstAttribute(pResponse);
 
 				while (pAttribute != NULL) {
-					while (pAttribute != NULL && pAttribute->group_tag != IPP_TAG_PRINTER) {
-						pAttribute = pAttribute->next;
+					while (pAttribute != NULL && ippGetGroupTag(pAttribute) != IPP_TAG_PRINTER) {
+						pAttribute = bjcups_ippNextAttribute(pResponse, pAttribute);
 					}
 					if (pAttribute == NULL) {
 						break;
 					}
 					
-					while (pAttribute != NULL && pAttribute->group_tag == IPP_TAG_PRINTER) {
-						if (strcmp(pAttribute->name, "printer-name") == 0 && pAttribute->value_tag == IPP_TAG_NAME) {
-							pPrinter = pAttribute->values[0].string.text;
+					while (pAttribute != NULL && ippGetGroupTag(pAttribute) == IPP_TAG_PRINTER) {
+						if (strcmp(ippGetName(pAttribute), "printer-name") == 0 && ippGetValueTag(pAttribute) == IPP_TAG_NAME) {
+							pPrinter = ippGetString(pAttribute, 0, NULL);
 						}
-						if (strcmp(pAttribute->name, "device-uri") == 0 && pAttribute->value_tag == IPP_TAG_URI) {
-							pDUri = pAttribute->values[0].string.text;
+						if (strcmp(ippGetName(pAttribute), "device-uri") == 0 && ippGetValueTag(pAttribute) == IPP_TAG_URI) {
+							pDUri = ippGetString(pAttribute, 0, NULL);
 						}
-						pAttribute = pAttribute->next;
+						pAttribute = bjcups_ippNextAttribute(pResponse, pAttribute);
 					}
 
 					if (strcasecmp(pDestName, pPrinter) == 0) {
@@ -739,7 +760,7 @@
 					}
 					
 					if (pAttribute != NULL)
-						 pAttribute = pAttribute->next;
+						pAttribute = bjcups_ippNextAttribute(pResponse, pAttribute);
 				}
 			}