diff --git a/prebuilt/common/bin/backuptool_ab.sh b/prebuilt/common/bin/backuptool_ab.sh
index 49766bd..4a167e0 100755
--- a/prebuilt/common/bin/backuptool_ab.sh
+++ b/prebuilt/common/bin/backuptool_ab.sh
@@ -57,7 +57,7 @@
   return 1
 fi
 
-if ! grep -q "^ro.omni.version=$V.*" /product/build.prop; then
+if ! grep -q "^ro.omni.version=$V.*" /system/build.prop; then
   echo "Backup/restore is not possible. Incompatible ROM version: $V"
   return 2
 fi