diff --git a/phosphor-power-supply/power_supply.hpp b/phosphor-power-supply/power_supply.hpp
index f67d2a1..2660f32 100644
--- a/phosphor-power-supply/power_supply.hpp
+++ b/phosphor-power-supply/power_supply.hpp
@@ -65,7 +65,7 @@
         return *pmbusIntf;
     }
 
-    GPIOInterface* getPresenceGPIO()
+    GPIOInterfaceBase* getPresenceGPIO()
     {
         return presenceGPIO.get();
     }
@@ -292,7 +292,7 @@
     /**
      * @brief The libgpiod object for monitoring PSU presence
      */
-    std::unique_ptr<GPIOInterface> presenceGPIO = nullptr;
+    std::unique_ptr<GPIOInterfaceBase> presenceGPIO = nullptr;
 
     /** @brief True if the power supply is present. */
     bool present = false;