diff --git a/install.sh b/install.sh
index 1e4180e2b7..ef9249a883 100755
--- a/install.sh
+++ b/install.sh
@@ -554,7 +554,7 @@ do_unmount() {
     MOUNTS=$(printf $MOUNTS | grep "^$1" | sort -r)
     if [ -n "${MOUNTS}" ]; then
         set -x
-        umount ${MOUNTS}
+        xargs -n 1 umount <<< ${MOUNTS}
     else
         set -x
     fi
diff --git a/package/rpm/install.sh b/package/rpm/install.sh
index d4f8b6d047..e1342fabd4 100755
--- a/package/rpm/install.sh
+++ b/package/rpm/install.sh
@@ -554,7 +554,7 @@ do_unmount() {
     MOUNTS=$(printf $MOUNTS | grep "^$1" | sort -r)
     if [ -n "${MOUNTS}" ]; then
         set -x
-        umount ${MOUNTS}
+        xargs -n 1 umount <<< ${MOUNTS}
     else
         set -x
     fi