1 files changed, 2 insertions, 1 deletions

diff --git a/src/alloc.c b/src/alloc.c
index 45234474a27..f33d93f83b4 100644
--- a/src/alloc.c
+++ b/src/alloc.c
@@ -6899,7 +6899,8 @@ sweep_misc (void)
               else if (mblk->markers[i].m.u_any.type == Lisp_Misc_User_Ptr)
                 {
                   struct Lisp_User_Ptr *uptr = &mblk->markers[i].m.u_user_ptr;
-                  uptr->finalizer (uptr->p);
+                  if (uptr->finalizer)
+                    uptr->finalizer (uptr->p);
                 }
 #endif
               /* Set the type of the freed object to Lisp_Misc_Free.