1 files changed, 1 insertions, 1 deletions

diff --git a/src/keyboard.c b/src/keyboard.c
index ab2d50ad0ea..1837958dcfd 100644
--- a/src/keyboard.c
+++ b/src/keyboard.c
@@ -1249,7 +1249,7 @@ cmd_error_internal (data, context)
   /* Use user's specified output function if any.  */
   if (!NILP (Vcommand_error_function))
     call3 (Vcommand_error_function, data,
-           build_string (context ? context : ""),
+           context ? build_string (context) : empty_unibyte_string,
            Vsignaling_function);
   /* If the window system or terminal frame hasn't been initialized
      yet, or we're not interactive, write the message to stderr and exit.  */