1 files changed, 2 insertions, 2 deletions
diff --git a/src/extension/internal/pdf-input-cairo.cpp b/src/extension/internal/pdf-input-cairo.cpp
index adac0d6c9..c45367c08 100644
--- a/src/extension/internal/pdf-input-cairo.cpp
+++ b/src/extension/internal/pdf-input-cairo.cpp
@@ -625,8 +625,8 @@ PdfInputCairo::open(Inkscape::Extension::Input * /*mod*/, const gchar * uri) {
     SPDocument * doc = SPDocument::createNewDocFromMem(output->c_str(), output->length(), TRUE);
 
     // Set viewBox if it doesn't exist
-    if (!doc->getRoot()->viewBox_set) {
-        doc->setViewBox(Geom::Rect::from_xywh(0, 0, doc->getWidth().quantity, doc->getHeight().quantity));
+    if (doc && !doc->getRoot()->viewBox_set) {
+        doc->setViewBox(Geom::Rect::from_xywh(0, 0, doc->getWidth().value(doc->getDefaultUnit()), doc->getHeight().value(doc->getDefaultUnit())));
     }
 
     delete output;