diff --git a/grubby-bls b/grubby-bls
index cce0579..52fbc76 100755
--- a/grubby-bls
+++ b/grubby-bls
@@ -500,7 +500,7 @@ update_bls_fragment() {
             if [[ -n $old_args ]]; then
                 opts="$(update_args "${old_args}" "${remove_args}" "${add_args}")"
                 opts="$(echo "$opts" | sed -e 's/\//\\\//g')"
-                sed -i -e "s/^GRUB_CMDLINE_LINUX.*/GRUB_CMDLINE_LINUX=\\\"${opts}\\\"/" "${grub_etc_default}"
+                sed -i -e "s/^GRUB_CMDLINE_LINUX=.*/GRUB_CMDLINE_LINUX=\\\"${opts}\\\"/" "${grub_etc_default}"
             fi
         fi
 
diff --git a/grubby.spec b/grubby.spec
index 44b20ad..bc7219f 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
+* Wed Jan 10 2024 Marta Lewandowska <mlewando@redhat.com> - 8.40-70
+- Do not overwrite all vars that start with GRUB_CMDLINE_LINUX
+
 * Thu Jan 19 2023 Fedora Release Engineering <releng@fedoraproject.org> - 8.40-69
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild