diff --git a/xtldr/efiutil.c b/xtldr/efiutil.c
index 562f4b4..7c2201c 100644
--- a/xtldr/efiutil.c
+++ b/xtldr/efiutil.c
@@ -229,7 +229,7 @@ BlComPortInitialize()
     /* Print debug message depending on port settings */
     if(PortAddress)
     {
-        BlEfiPrint(L"Initializing serial console at COM port address: %lx\n", PortAddress);
+        BlEfiPrint(L"Initializing serial console at COM port address: 0x%lx\n", PortAddress);
     }
     else
     {