diff --git a/src/northbridge/intel/x4x/ram_calc.c b/src/northbridge/intel/x4x/ram_calc.c
index 3714969..be9c10f 100644
--- a/src/northbridge/intel/x4x/ram_calc.c
+++ b/src/northbridge/intel/x4x/ram_calc.c
@@ -134,8 +134,6 @@
 	return (void *) top_of_ram;
 }
 
-#define ROMSTAGE_RAM_STACK_SIZE 0x5000
-
 /* platform_enter_postcar() determines the stack to use after
  * cache-as-ram is torn down as well as the MTRR settings to use,
  * and continues execution in postcar stage. */
@@ -144,7 +142,7 @@
 	struct postcar_frame pcf;
 	uintptr_t top_of_ram;
 
-	if (postcar_frame_init(&pcf, ROMSTAGE_RAM_STACK_SIZE))
+	if (postcar_frame_init(&pcf, 0))
 		die("Unable to initialize postcar frame.\n");
 
 	/* Cache the ROM as WP just below 4GiB. */