1 files changed, 2 insertions, 1 deletions

diff --git a/src/eval.c b/src/eval.c
index c826aa240cc..f53ce8ef651 100644
--- a/src/eval.c
+++ b/src/eval.c
@@ -163,7 +163,8 @@ init_eval ()
   Vquit_flag = Qnil;
   debug_on_next_call = 0;
   lisp_eval_depth = 0;
-  when_entered_debugger = 0;
+  /* This is less than the initial value of num_nonmacro_input_chars.  */
+  when_entered_debugger = -1;
 }
 
 Lisp_Object