diff --git a/grubby-bls b/grubby-bls
index cce0579..2d59de7 100755
--- a/grubby-bls
+++ b/grubby-bls
@@ -827,12 +827,15 @@ fi
 remove_var_prefix "$(get_prefix)"
 
 if [[ -n $kernel ]]; then
-    opts="${bls_options[$default_index]}"
-    if [[ $copy_default != "true" ]]; then
-        opts=$(echo $opts | sed -e 's/ .*//')
-    fi
-    if [[ -n $args ]]; then
-        opts="${opts} ${args}"
+    if [[ $copy_default = "true" ]]; then
+	opts="${bls_options[$default_index]}"
+	if [[ -n $args ]]; then
+	    opts="${opts} ${args}"
+	fi
+    else
+	opts="${opts} ${args}"
+	remove_args="$kernelopts"
+	update_args "${opts}" "${remove_args}" ""
     fi
 
     add_bls_fragment "${kernel}" "${title}" "${opts}" "${initrd}" \
diff --git a/grubby.spec b/grubby.spec
index 44b20ad..4ae304d 100644
--- a/grubby.spec
+++ b/grubby.spec
@@ -3,7 +3,7 @@
 
 Name: grubby
 Version: 8.40
-Release: 69%{?dist}
+Release: 70%{?dist}
 Summary: Command line tool for updating bootloader configs
 License: GPLv2+
 Source1: grubby-bls
@@ -77,6 +77,9 @@ fi
 %{_mandir}/man8/grubby.8*
 
 %changelog
+* Tue Feb 21 2023 Marta Lewandowska <mlewando@redhat.com> - 8.40-70
+- remove root= when not copying default
+
 * Thu Jan 19 2023 Fedora Release Engineering <releng@fedoraproject.org> - 8.40-69
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild