diff --git a/src/northbridge/intel/i945/acpi/i945.asl b/src/northbridge/intel/i945/acpi/i945.asl
index 5e7f4ec..349234b 100644
--- a/src/northbridge/intel/i945/acpi/i945.asl
+++ b/src/northbridge/intel/i945/acpi/i945.asl
@@ -37,7 +37,7 @@
 	//})
 
 	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, 0x00004000)
 		Memory32Fixed(ReadWrite, DEFAULT_DMIBAR, 0x00001000)
 		Memory32Fixed(ReadWrite, DEFAULT_EPBAR, 0x00001000)