diff --git a/PDP11/pdp11_rp.c b/PDP11/pdp11_rp.c
index b8a74286..4b8a956b 100644
--- a/PDP11/pdp11_rp.c
+++ b/PDP11/pdp11_rp.c
@@ -528,9 +528,6 @@ BITFIELD *rp_reg_bits[] = {
 #define RP07_DEV        020042
 #define RP07_SIZE       (RP07_SECT * RP07_SURF * RP07_CYL * RP_NUMWD)
 
-#define RP_CTRL         0
-#define RM_CTRL         1
-
 struct drvtyp {
     int32       sect;                                   /* sectors */
     int32       surf;                                   /* surfaces */