diff --git a/plugins/check_ping.c b/plugins/check_ping.c
index bd7911d7..74b6fce2 100644
--- a/plugins/check_ping.c
+++ b/plugins/check_ping.c
@@ -71,7 +71,7 @@ main (int argc, char **argv)
 	int this_result = STATE_UNKNOWN;
 	int i;
 
-	setlocale (LC_ALL, "");
+	setlocale (LC_NUMERIC, "C");
 	bindtextdomain (PACKAGE, LOCALEDIR);
 	textdomain (PACKAGE);