diff --git a/tools/releasetools/common.py b/tools/releasetools/common.py
index 374babf..cff7542 100644
--- a/tools/releasetools/common.py
+++ b/tools/releasetools/common.py
@@ -455,6 +455,11 @@
     return vabc_enabled
 
   @property
+  def is_android_r(self):
+    system_prop = self.info_dict.get("system.build.prop")
+    return system_prop and system_prop.GetProp("ro.build.version.release") == "11"
+
+  @property
   def is_vabc_xor(self):
     vendor_prop = self.info_dict.get("vendor.build.prop")
     vabc_xor_enabled = vendor_prop and \