diff --git a/src/api.c b/src/api.c
index 6ea06a2..e9755ff 100644
--- a/src/api.c
+++ b/src/api.c
@@ -1212,7 +1212,6 @@ imlib_clone_image(void)
    memcpy(im->data, im_old->data, im->w * im->h * sizeof(DATA32));
    im->flags = im_old->flags;
    SET_FLAG(im->flags, F_UNCACHEABLE);
-   SET_FLAG(im->flags, F_UNCACHEABLE);
    im->moddate = im_old->moddate;
    im->border = im_old->border;
    im->loader = im_old->loader;