1 files changed, 1 insertions, 0 deletions

diff --git a/src/msdos.c b/src/msdos.c
index 9090f804c31..c565edfc299 100644
--- a/src/msdos.c
+++ b/src/msdos.c
@@ -940,6 +940,7 @@ IT_write_glyphs (struct glyph *str, int str_len)
       encode_coding (coding, "", conversion_buffer, 0, conversion_buffer_size);
       if (coding->produced > 0)
         {
+          screen_buf = alloca (coding->produced * 2);
           for (screen_bp = screen_buf, bp = conversion_buffer;
                coding->produced--; bp++)
             {