diff --git a/src/w32font.c b/src/w32font.c
index bd68e22cc9..fe85601380 100644
--- a/src/w32font.c
+++ b/src/w32font.c
@@ -704,11 +704,20 @@ w32font_draw (struct glyph_string *s, int from, int to,
       int i;
 
       for (i = 0; i < len; i++)
-	ExtTextOutW (s->hdc, x + i, y, options, NULL,
-		     s->char2b + from + i, 1, NULL);
+        {
+          const wchar_t ch = s->char2b[from + i];
+          ExtTextOutW (s->hdc, x + i, y, options, NULL, &ch, 1, NULL);
+        }
     }
   else
-    ExtTextOutW (s->hdc, x, y, options, NULL, s->char2b + from, len, NULL);
+    {
+      USE_SAFE_ALLOCA;
+      wchar_t *str = SAFE_ALLOCA (len);
+      for (int i = 0; i < len; ++i)
+        str[i] = s->char2b[from + i];
+      ExtTextOutW (s->hdc, x, y, options, NULL, str, len, NULL);
+      SAFE_FREE ();
+    }
 
   /* Restore clip region.  */
   if (s->num_clips > 0)