diff --git a/src/northbridge/intel/haswell/acpi/hostbridge.asl b/src/northbridge/intel/haswell/acpi/hostbridge.asl
index 50a1306..1ff2826 100644
--- a/src/northbridge/intel/haswell/acpi/hostbridge.asl
+++ b/src/northbridge/intel/haswell/acpi/hostbridge.asl
@@ -174,7 +174,7 @@
 	Name (_UID, 1)
 
 	Name (PDRS, ResourceTemplate () {
-		Memory32Fixed (ReadWrite, CONFIG_FIXED_RCBA_MMIO_BASE, 0x00004000)
+		Memory32Fixed (ReadWrite, CONFIG_FIXED_RCBA_MMIO_BASE, CONFIG_RCBA_LENGTH)
 		Memory32Fixed (ReadWrite, DEFAULT_MCHBAR,   0x00008000)
 		Memory32Fixed (ReadWrite, DEFAULT_DMIBAR,   0x00001000)
 		Memory32Fixed (ReadWrite, DEFAULT_EPBAR,    0x00001000)