diff --git a/phpactor.el b/phpactor.el
index 62e5d19..449a52c 100644
--- a/phpactor.el
+++ b/phpactor.el
@@ -200,6 +200,7 @@ of GitHub.")
                                               :parameters arguments)))
         (output (get-buffer-create "*Phpactor Output*"))
         (phpactor-executable (phpactor-find-executable))
+        (coding-system-for-write 'utf-8)
         (cwd (phpactor-get-working-dir)))
     (with-current-buffer output (erase-buffer))
     (with-current-buffer (get-buffer-create "*Phpactor Input*")