diff --git a/config/versions.mk b/config/versions.mk
index 8ed6cc8..7ebe7db 100644
--- a/config/versions.mk
+++ b/config/versions.mk
@@ -4,6 +4,9 @@
 BLISS_VERSION_MINOR = 0
 # BLISS_VERSION_MAINTENANCE = Stable
 
+# Bliss Android version
+BLISS_VERSION_STATIC = 11.0
+
 #ifdef BLISS_VERSION_MAINTENANCE
 #    VERSION := $(BLISS_VERSION_MAJOR).$(BLISS_VERSION_MINOR)-$(BLISS_VERSION_MAINTENANCE)
 #else
diff --git a/prebuilt/common/bin/backuptool.sh b/prebuilt/common/bin/backuptool.sh
index 29f8818..a9be514 100755
--- a/prebuilt/common/bin/backuptool.sh
+++ b/prebuilt/common/bin/backuptool.sh
@@ -4,9 +4,9 @@
 #
 
 export C=/tmp/backupdir
+export V=11.0
 export SYSDEV="$(readlink -nf "$2")"
 export SYSFS="$3"
-export V=18.0
 
 # Scripts in /system/addon.d expect to find backuptool.functions in /tmp
 cp -f /tmp/install/bin/backuptool.functions /tmp
@@ -36,7 +36,7 @@
   echo "Backup/restore is not possible. Partition is probably empty"
   return 1
 fi
-if ! grep -q "^ro.bliss.version=$V.*" $S/build.prop; then
+if ! grep -q "^ro.bliss.static.version=$V.*" $S/build.prop; then
   echo "Backup/restore is not possible. Incompatible ROM version: $V"
   return 2
 fi
diff --git a/prebuilt/common/bin/backuptool_ab.sh b/prebuilt/common/bin/backuptool_ab.sh
index 3a47e4f..4867e4e 100755
--- a/prebuilt/common/bin/backuptool_ab.sh
+++ b/prebuilt/common/bin/backuptool_ab.sh
@@ -5,7 +5,7 @@
 
 export S=/system
 export C=/postinstall/tmp/backupdir
-export V=18.0
+export V=11.0
 
 export ADDOND_VERSION=2
 
@@ -50,7 +50,8 @@
   echo "Backup/restore is not possible. Partition is probably empty"
   return 1
 fi
-if ! grep -q "^ro.bliss.version=$V.*" /system/build.prop; then
+
+if ! grep -q "^ro.bliss.static.version=$V.*" /system/build.prop; then
   echo "Backup/restore is not possible. Incompatible ROM version: $V"
   return 2
 fi