diff --git a/boot/freeldr/freeldr/arch/i386/xbox/xboxmem.c b/boot/freeldr/freeldr/arch/i386/xbox/xboxmem.c
index 29e1382be18..57a88ecf4a8 100644
--- a/boot/freeldr/freeldr/arch/i386/xbox/xboxmem.c
+++ b/boot/freeldr/freeldr/arch/i386/xbox/xboxmem.c
@@ -61,7 +61,7 @@ XboxMemInit(VOID)
     PVOID MembaseLow = (PVOID)0;
 
     WRITE_REGISTER_ULONG((PULONG)NV2A_FB_CFG0, 0x03070103);
-    WRITE_REGISTER_ULONG((PULONG)NV2A_FB_CFG0 + 4, 0x11448000);
+    WRITE_REGISTER_ULONG((PULONG)(NV2A_FB_CFG0 + 4), 0x11448000);
 
     /* Prep hardware for 128 Mb */
     WRITE_PORT_ULONG((PULONG)0xCF8, CONFIG_CMD(0, 0, 0x84));