diff --git a/scheduler/ipp.c b/scheduler/ipp.c
index 728d164..5089172 100644
--- a/scheduler/ipp.c
+++ b/scheduler/ipp.c
@@ -5773,6 +5773,18 @@ create_local_bg_thread(
     cupsdLogMessage(CUPSD_LOG_DEBUG, "%s: IPP/1.1 Get-Printer-Attributes returned %s (%s)", printer->name, ippErrorString(cupsLastError()), cupsLastErrorString());
   }
 
+  // Validate response from printer...
+  if (!ippValidateAttributes(response))
+  {
+    cupsdLogMessage(CUPSD_LOG_ERROR, "%s: The printer contains invalid attributes.", printer->name);
+
+    if (response)
+      ippDelete(response);
+
+    httpClose(http);
+    return (NULL);
+  }
+
   // TODO: Grab printer icon file...
   httpClose(http);
 
diff --git a/systemv/lpadmin.c b/systemv/lpadmin.c
index daf24d5..eba7551 100644
--- a/systemv/lpadmin.c
+++ b/systemv/lpadmin.c
@@ -1226,6 +1226,12 @@ get_printer_ppd(
   ippAddStrings(request, IPP_TAG_OPERATION, IPP_TAG_KEYWORD, "requested-attributes", sizeof(pattrs) / sizeof(pattrs[0]), NULL, pattrs);
   response = cupsDoRequest(http, request, resource);
 
+  if (response && !ippValidateAttributes(response))
+  {
+    _cupsLangPrintf(stderr, _("%s: The printer \"%s\" contains invalid IPP attributes."), "lpadmin", uri);
+    return (NULL);
+  }
+
   if (cupsLastError() >= IPP_STATUS_REDIRECTION_OTHER_SITE)
   {
     _cupsLangPrintf(stderr, _("%s: Unable to query printer: %s"), "lpadmin", cupsLastErrorString());