diff --git a/roles/serial-console/tasks/main.yml b/roles/serial-console/tasks/main.yml
index 9b59c6a4b1..1ca3c77f2b 100644
--- a/roles/serial-console/tasks/main.yml
+++ b/roles/serial-console/tasks/main.yml
@@ -3,7 +3,7 @@
 #
 ---
 - name: check for grub serial setup
-  command: grep options /boot/loader/entries/*
+  shell: grep options /boot/loader/entries/*
   register: serial
   check_mode: no
   changed_when: '1 != 1'