diff --git a/src/dtgtk/thumbtable.c b/src/dtgtk/thumbtable.c
index 26189d909ced..d7d5f87a7f65 100644
--- a/src/dtgtk/thumbtable.c
+++ b/src/dtgtk/thumbtable.c
@@ -853,9 +853,9 @@ static gboolean _event_scroll(GtkWidget *widget, GdkEvent *event, gpointer user_
 {
   GdkEventScroll *e = (GdkEventScroll *)event;
   dt_thumbtable_t *table = (dt_thumbtable_t *)user_data;
-  gdouble delta;
+  int delta;
 
-  if(dt_gui_get_scroll_delta(e, &delta))
+  if(dt_gui_get_scroll_unit_delta(e, &delta))
   {
     if(table->mode == DT_THUMBTABLE_MODE_FILEMANAGER && (e->state & GDK_CONTROL_MASK) == GDK_CONTROL_MASK)
     {