diff --git a/src/backends/x11/meta-seat-x11.c b/src/backends/x11/meta-seat-x11.c
index 8a3429a8f..487897b3e 100644
--- a/src/backends/x11/meta-seat-x11.c
+++ b/src/backends/x11/meta-seat-x11.c
@@ -2198,13 +2198,13 @@ meta_seat_x11_translate_event (MetaSeatX11  *seat,
         double *axes;
 
         source_device = get_source_device_checked (seat, xev);
-	if (!source_device)
-          return NULL;
+        if (!source_device)
+              return NULL;
 
         device = g_hash_table_lookup (seat->devices_by_id,
                                       GINT_TO_POINTER (xev->deviceid));
 
-	if (clutter_input_device_get_device_type (source_device) == CLUTTER_PAD_DEVICE)
+        if (clutter_input_device_get_device_type (source_device) == CLUTTER_PAD_DEVICE)
           {
             uint32_t button, group, mode;