diff --git a/check_galera_cluster b/check_galera_cluster
index 2cf5c5e..dad46b1 100755
--- a/check_galera_cluster
+++ b/check_galera_cluster
@@ -1,5 +1,6 @@
 #!/bin/bash
 
+LANG=C
 
 PROGNAME=`basename $0`
 VERSION="Version 1.1.5"