diff --git a/phosphor-power-supply/power_supply.cpp b/phosphor-power-supply/power_supply.cpp
index 02fe779..dbdfb20 100644
--- a/phosphor-power-supply/power_supply.cpp
+++ b/phosphor-power-supply/power_supply.cpp
@@ -267,7 +267,7 @@
 {
     using namespace phosphor::pmbus;
 
-#ifdef IBM_VPD
+#if IBM_VPD
     std::string ccin;
     std::string pn;
     std::string fn;
@@ -291,7 +291,7 @@
     {
         // TODO: non-IBM inventory updates?
 
-#ifdef IBM_VPD
+#if IBM_VPD
         try
         {
             ccin = pmbusIntf->readString(CCIN, Type::HwmonDeviceDebug);
diff --git a/phosphor-power-supply/power_supply.hpp b/phosphor-power-supply/power_supply.hpp
index b39cb89..03c6928 100644
--- a/phosphor-power-supply/power_supply.hpp
+++ b/phosphor-power-supply/power_supply.hpp
@@ -11,7 +11,7 @@
 namespace phosphor::power::psu
 {
 
-#ifdef IBM_VPD
+#if IBM_VPD
 // PMBus device driver "file name" to read for CCIN value.
 constexpr auto CCIN = "ccin";
 constexpr auto PART_NUMBER = "part_number";