diff --git a/thumbnailer/evince-thumbnailer.c b/thumbnailer/evince-thumbnailer.c
index 16492524..998447d0 100644
--- a/thumbnailer/evince-thumbnailer.c
+++ b/thumbnailer/evince-thumbnailer.c
@@ -177,7 +177,7 @@ evince_thumbnail_pngenc_get (EvDocument *document, const char *thumbnail, int si
 	
 	ev_document_get_page_size (document, 0, &width, &height);
 
-	rc = ev_render_context_new (page, 0, size / width);
+	rc = ev_render_context_new (page, 0, size / MAX (height, width));
 	pixbuf = ev_document_get_thumbnail (document, rc);
 	g_object_unref (rc);
 	g_object_unref (page);