1 files changed, 2 insertions, 2 deletions

diff --git a/src/xfns.c b/src/xfns.c
index a0229919aa0..e431651d93a 100644
--- a/src/xfns.c
+++ b/src/xfns.c
@@ -2956,7 +2956,7 @@ x_default_font_parameter (struct frame *f, Lisp_Object parms)
          read yet.  */
       const char *system_font = xsettings_get_system_font ();
       if (system_font)
-        font = font_open_by_name (f, system_font, strlen (system_font));
+        font = font_open_by_name (f, build_unibyte_string (system_font));
     }
 
   if (NILP (font))
@@ -2986,7 +2986,7 @@ x_default_font_parameter (struct frame *f, Lisp_Object parms)
 
       for (i = 0; names[i]; i++)
         {
-          font = font_open_by_name (f, names[i], strlen (names[i]));
+          font = font_open_by_name (f, build_unibyte_string (names[i]));
           if (! NILP (font))
             break;
         }