1 files changed, 1 insertions, 0 deletions

diff --git a/src/callint.c b/src/callint.c
index d96454883cf..96436116c8b 100644
--- a/src/callint.c
+++ b/src/callint.c
@@ -690,6 +690,7 @@ invoke it.  If KEYS is omitted or nil, the return value of
         case 'N':     /* Prefix arg as number, else number from minibuffer.  */
           if (!NILP (prefix_arg))
             goto have_prefix_arg;
+          FALLTHROUGH;
         case 'n':               /* Read number from minibuffer.  */
           args[i] = call1 (Qread_number, callint_message);
           /* Passing args[i] directly stimulates compiler bug.  */