diff --git a/widget/src/gtk2/nsDeviceContextSpecG.cpp b/widget/src/gtk2/nsDeviceContextSpecG.cpp
index 8038568b4d68..f40d465cbf8a 100644
--- a/widget/src/gtk2/nsDeviceContextSpecG.cpp
+++ b/widget/src/gtk2/nsDeviceContextSpecG.cpp
@@ -391,6 +391,16 @@ nsDeviceContextSpecGTK::nsDeviceContextSpecGTK()
 nsDeviceContextSpecGTK::~nsDeviceContextSpecGTK()
 {
   DO_PR_DEBUG_LOG(("nsDeviceContextSpecGTK::~nsDeviceContextSpecGTK()\n"));
+
+  if (mGtkPageSetup) {
+    g_object_unref(mGtkPageSetup);
+    mGtkPageSetup = NULL;
+  }
+
+  if (mGtkPrintSettings) {
+    g_object_unref(mGtkPrintSettings);
+    mGtkPrintSettings = NULL;
+  }
 }
 
 NS_IMPL_ISUPPORTS1(nsDeviceContextSpecGTK,
@@ -510,6 +520,25 @@ NS_IMETHODIMP nsDeviceContextSpecGTK::Init(nsIWidget *aWidget,
   mGtkPrintSettings = printSettingsGTK->GetGtkPrintSettings();
   mGtkPageSetup = printSettingsGTK->GetGtkPageSetup();
 
+  // This is a horrible workaround for some printer driver bugs that treat custom page sizes different
+  // to standard ones. If our paper object matches one of a standard one, use a standard paper size
+  // object instead.
+  GtkPaperSize* geckosHackishPaperSize = gtk_page_setup_get_paper_size(mGtkPageSetup);
+  GtkPaperSize* standardGtkPaperSize = gtk_paper_size_new(gtk_paper_size_get_name(geckosHackishPaperSize));
+
+  mGtkPageSetup = gtk_page_setup_copy(mGtkPageSetup);
+  mGtkPrintSettings = gtk_print_settings_copy(mGtkPrintSettings);
+
+  GtkPaperSize* properPaperSize;
+  if (gtk_paper_size_is_equal(geckosHackishPaperSize, standardGtkPaperSize)) {
+    properPaperSize = standardGtkPaperSize;
+  } else {
+    properPaperSize = geckosHackishPaperSize;
+    gtk_paper_size_free(standardGtkPaperSize);
+  }
+  gtk_print_settings_set_paper_size(mGtkPrintSettings, properPaperSize);
+  gtk_page_setup_set_paper_size_and_default_margins(mGtkPageSetup, properPaperSize);
+
   return NS_OK;
 }