diff --git a/sonic_psu/psu_base.py b/sonic_psu/psu_base.py
index b20e6af2723f..fba50b4627b5 100644
--- a/sonic_psu/psu_base.py
+++ b/sonic_psu/psu_base.py
@@ -14,6 +14,15 @@
 class PsuBase(object):
     __metaclass__ = abc.ABCMeta
 
+    @abc.abstractmethod
+    def get_num_psus(self):
+        """
+        Retrieves the number of PSUs available on the device
+
+        :return: An integer, the number of PSUs available on the device
+        """
+        return 0
+
     @abc.abstractmethod
     def get_psu_status(self, index):
         """