diff --git a/grubby-bls b/grubby-bls
index cf9f593..ee28802 100755
--- a/grubby-bls
+++ b/grubby-bls
@@ -686,7 +686,7 @@ if [[ -n $display_info ]]; then
     display_info_values "${display_info}"
 fi
 
-if [[ $bootloader = grub2 ]]; then
+if [[ $bootloader = grub2 ]] && grep -q /boot /proc/mounts; then
     remove_var_prefix
 fi
 
diff --git a/grubby.spec b/grubby.spec
index e75d1d8..a5ecffc 100644
--- a/grubby.spec
+++ b/grubby.spec
@@ -151,6 +151,8 @@ current boot environment.
   Resolves: rhbz#1634752
 - grubby-bls: fix --default-* options for s390x
   Resolves: rhbz#1644608
+- grubby-bls: only compare using relative paths if /boot is a mount point
+  Resolves: rhbz#1642078
 
 * Fri Aug 10 2018 Javier Martinez Canillas <javierm@redhat.com> - 8.40-18
 - Make installkernel to use kernel-install scripts on BLS configuration