diff --git a/openbox/client.h b/openbox/client.h
index a75c6d2b..5f654d7e 100644
--- a/openbox/client.h
+++ b/openbox/client.h
@@ -272,6 +272,7 @@ struct _ObClient
 
 struct _ObAppSettings
 {
+    gchar *class;
     gchar *name;
     gchar *role;