diff --git a/minifirewall/tasks/config.yml b/minifirewall/tasks/config.yml
index db74a357..5d7f710b 100644
--- a/minifirewall/tasks/config.yml
+++ b/minifirewall/tasks/config.yml
@@ -1,7 +1,7 @@
 ---
 
 - name: Check if minifirewall is running
-  command: /sbin/iptables -L -n | grep -E "^(DROP\s+udp|ACCEPT\s+icmp)\s+--\s+0\.0\.0\.0\/0\s+0\.0\.0\.0\/0\s*$"
+  shell: /sbin/iptables -L -n | grep -E "^(DROP\s+udp|ACCEPT\s+icmp)\s+--\s+0\.0\.0\.0\/0\s+0\.0\.0\.0\/0\s*$"
   changed_when: False
   failed_when: False
   #check_mode: no (for migration to Ansible 2.2)