diff -ur monitoring-plugins-2.2/plugins/check_ping.c monitoring-plugins-2.2_fix/plugins/check_ping.c
--- monitoring-plugins-2.2/plugins/check_ping.c	2016-11-29 09:45:08.000000000 +0100
+++ monitoring-plugins-2.2_fix/plugins/check_ping.c	2019-04-09 14:09:57.574380368 +0200
@@ -128,6 +128,11 @@
 #else
 		xasprintf (&cmd, rawcmd, addresses[i], max_packets);
 #endif
+		if (address_family == AF_INET) {
+			free(rawcmd);
+			rawcmd = cmd;
+			xasprintf (&cmd, "%s -4", rawcmd);
+		}
 
 		if (verbose >= 2)
 			printf ("CMD: %s\n", cmd);