diff --git a/usr.sbin/freebsd-update/freebsd-update.sh b/usr.sbin/freebsd-update/freebsd-update.sh
index 3d6d52ec33cd..9db0c6cd928d 100644
--- a/usr.sbin/freebsd-update/freebsd-update.sh
+++ b/usr.sbin/freebsd-update/freebsd-update.sh
@@ -1926,6 +1926,9 @@ cmd_rollback () {
 # Make sure we find utilities from the base system
 export PATH=/sbin:/bin:/usr/sbin:/usr/bin:${PATH}
 
+# Set LC_ALL in order to avoid problems with character ranges like [A-Z].
+export LC_ALL=C
+
 get_params $@
 for COMMAND in ${COMMANDS}; do
 	cmd_${COMMAND}
diff --git a/usr.sbin/portsnap/portsnap/portsnap.sh b/usr.sbin/portsnap/portsnap/portsnap.sh
index 6cecd49a2456..e13b87df4b96 100644
--- a/usr.sbin/portsnap/portsnap/portsnap.sh
+++ b/usr.sbin/portsnap/portsnap/portsnap.sh
@@ -1032,6 +1032,9 @@ cmd_update() {
 # Make sure we find utilities from the base system
 export PATH=/sbin:/bin:/usr/sbin:/usr/bin:${PATH}
 
+# Set LC_ALL in order to avoid problems with character ranges like [A-Z].
+export LC_ALL=C
+
 get_params $@
 for COMMAND in ${COMMANDS}; do
 	cmd_${COMMAND}