diff --git a/lib/sp-zoom-manager.c b/lib/sp-zoom-manager.c
index b7c5baf4..9baab005 100644
--- a/lib/sp-zoom-manager.c
+++ b/lib/sp-zoom-manager.c
@@ -32,7 +32,7 @@ struct _SpZoomManager
   gdouble min_zoom;
   gdouble max_zoom;
   gdouble zoom;
-};
+} __attribute__((aligned(8)));
 
 enum {
   PROP_0,