diff --git a/sysdeps/unix/sysv/linux/alpha/ioperm.c b/sysdeps/unix/sysv/linux/alpha/ioperm.c
index 488265a069..b39f39a0d7 100644
--- a/sysdeps/unix/sysv/linux/alpha/ioperm.c
+++ b/sysdeps/unix/sysv/linux/alpha/ioperm.c
@@ -67,8 +67,8 @@
 #define CIA_DENSE_MEM		(0xfffffc8600000000UL)
 
 #define T2_IO_BASE		(0xfffffc03a0000000UL)
-#define T2_SPARSE_BASE		(0xfffffc0200000000UL)
-#define T2_DENSE_BASE		(0xfffffc03c0000000UL)
+#define T2_SPARSE_MEM		(0xfffffc0200000000UL)
+#define T2_DENSE_MEM		(0xfffffc03c0000000UL)
 
 typedef enum {
   IOSYS_UNKNOWN, IOSYS_JENSEN, IOSYS_APECS, IOSYS_CIA, IOSYS_T2