--- a/widget/gtk/nsDeviceContextSpecG.cpp
+++ b/widget/gtk/nsDeviceContextSpecG.cpp
@@ -290,18 +290,24 @@ nsDeviceContextSpecGTK::EnumeratePrinter
                          nullptr, TRUE);
 }
 
 NS_IMETHODIMP
 nsDeviceContextSpecGTK::BeginDocument(const nsAString& aTitle,
                                       const nsAString& aPrintToFileName,
                                       int32_t aStartPage, int32_t aEndPage)
 {
-  mTitle.Truncate();
-  AppendUTF16toUTF8(aTitle, mTitle);
+  // Print job names exceeding 255 bytes are safe with GTK version 3.18.2 or
+  // newer. This is a workaround for old GTK.
+  if (gtk_check_version(3,18,2) != nullptr) {
+    PrintTarget::AdjustPrintJobNameForIPP(aTitle, mTitle);
+  } else {
+    CopyUTF16toUTF8(aTitle, mTitle);
+  }
+
   return NS_OK;
 }
 
 NS_IMETHODIMP nsDeviceContextSpecGTK::EndDocument()
 {
   if (mToPrinter) {
     // At this point, we might have a GtkPrinter set up in nsPrintSettingsGTK,
     // or we might not. In the single-process case, we probably will, as this