diff --git a/src/parisc/hppa_hardware.h b/src/parisc/hppa_hardware.h
index 4ad8205..9cfdb23 100644
--- a/src/parisc/hppa_hardware.h
+++ b/src/parisc/hppa_hardware.h
@@ -31,6 +31,7 @@
 #define CPU_HPA         0xfffb0000
 #define MEMORY_HPA      0xfffff000
 
+#define IDE_HPA         0xf9000000      /* Boot disc controller */
 #define ASTRO_HPA       0xfed00000
 #define ELROY0_HPA      0xfed30000
 #define ELROY2_HPA      0xfed32000
@@ -60,7 +61,6 @@
 #define CPU_HPA_CR_REG  7       /* store CPU HPA in cr7 (SeaBIOS internal) */
 #define PIM_STORAGE_SIZE 600	/* storage size of pdc_pim_toc_struct (64bit) */
 
-
 #define ASTRO_BUS_MODULE        0x0a            /* C3700: 0x0a, others maybe 0 ? */
 
 /* ASTRO Memory and I/O regions */