diff --git a/app/operations/gimpoperationshrink.c b/app/operations/gimpoperationshrink.c
index 08a7dd5b32..c862edb471 100644
--- a/app/operations/gimpoperationshrink.c
+++ b/app/operations/gimpoperationshrink.c
@@ -184,8 +184,9 @@ gimp_operation_shrink_set_property (GObject      *object,
 static void
 gimp_operation_shrink_prepare (GeglOperation *operation)
 {
-  gegl_operation_set_format (operation, "input",  babl_format ("Y float"));
-  gegl_operation_set_format (operation, "output", babl_format ("Y float"));
+  const Babl *space = gegl_operation_get_source_space (operation, "input");
+  gegl_operation_set_format (operation, "input",  babl_format_with_space ("Y float", space));
+  gegl_operation_set_format (operation, "output", babl_format_with_space ("Y float", space));
 }
 
 static GeglRectangle