diff --git a/UefiPayloadPkg/Library/PciHostBridgeLib/PciHostBridgeLib.c b/UefiPayloadPkg/Library/PciHostBridgeLib/PciHostBridgeLib.c
index 790e6109c0..5727475414 100644
--- a/UefiPayloadPkg/Library/PciHostBridgeLib/PciHostBridgeLib.c
+++ b/UefiPayloadPkg/Library/PciHostBridgeLib/PciHostBridgeLib.c
@@ -135,7 +135,7 @@ InitRootBridge (
                  &mRootBridgeDevicePathTemplate
                  );
   if (DevicePath == NULL) {
-    DEBUG ((DEBUG_ERROR, "%a: %r\n", __FUNCTION__, EFI_OUT_OF_RESOURCES));
+    DEBUG ((DEBUG_ERROR, "%a: %r\n", __func__, EFI_OUT_OF_RESOURCES));
     return EFI_OUT_OF_RESOURCES;
   }
 
@@ -145,7 +145,7 @@ InitRootBridge (
   DEBUG ((
     DEBUG_INFO,
     "%a: populated root bus %d, with room for %d subordinate bus(es)\n",
-    __FUNCTION__,
+    __func__,
     RootBusNumber,
     MaxSubBusNumber - RootBusNumber
     ));
diff --git a/UefiPayloadPkg/UefiPayloadEntry/Ia32/DxeLoadFunc.c b/UefiPayloadPkg/UefiPayloadEntry/Ia32/DxeLoadFunc.c
index c66e56aee1..61a9f01ec9 100644
--- a/UefiPayloadPkg/UefiPayloadEntry/Ia32/DxeLoadFunc.c
+++ b/UefiPayloadPkg/UefiPayloadEntry/Ia32/DxeLoadFunc.c
@@ -355,7 +355,7 @@ HandOffToDxeCore (
     DEBUG ((
       DEBUG_INFO,
       "%a() Stack Base: 0x%lx, Stack Size: 0x%x\n",
-      __FUNCTION__,
+      __func__,
       BaseOfStack,
       STACK_SIZE
       ));