diff --git a/include/hamlib/rotlist.h b/include/hamlib/rotlist.h
index e55842cfb..1a72af7be 100644
--- a/include/hamlib/rotlist.h
+++ b/include/hamlib/rotlist.h
@@ -183,9 +183,8 @@
  */
 #define ROT_SPID 9
 #define ROT_BACKEND_SPID "spid"
-#define ROT_MODEL_SPID_ROT1PROG ROT_MAKE_MODEL(ROT_SPID, 1)
-#define ROT_MODEL_SPID_ROT2PROG ROT_MAKE_MODEL(ROT_SPID, 2)
-
+#define ROT_MODEL_SPID_ROT2PROG ROT_MAKE_MODEL(ROT_SPID, 1)
+#define ROT_MODEL_SPID_ROT1PROG ROT_MAKE_MODEL(ROT_SPID, 2)
 
 /*! \def ROT_MODEL_M2
  *  \brief A macro that returns the model number of the M2 backend.
diff --git a/spid/spid.txt b/spid/spid.txt
index dadc1aa02..743d36e49 100644
--- a/spid/spid.txt
+++ b/spid/spid.txt
@@ -120,9 +120,9 @@ The PH and PV values in the response packet reflect the settings of
 the rotator controller. The Rot2Prog supports the following
 resolutions (always the same for azimuth and elevation):
 
-    1    pulse/deg: PH=0x01, PV=0x01
-    0.5  pulse/deg: PH=0x02, PV=0x02
-    0.25 pulse/deg: PH=0x04, PV=0x04
+    1    deg/pulse: PH=0x01, PV=0x01
+    0.5  deg/pulse: PH=0x02, PV=0x02
+    0.25 deg/pulse: PH=0x04, PV=0x04
 
 
 
@@ -234,7 +234,7 @@ E.g., when pointing a Rot1Prog to azimuth 123:
     | 57| 34 | 38 | 33 | 30 | 00 | 00 | 00 | 00 | 00 | 00 | 2F| 20  | (hex)
     -----------------------------------------------------------------
 
-    Note that H4 is not used.
+    Note that H4 is not used and always set to 0x30.
 
 E.g., when pointing a Rot2Prog to azimuth 123.5, elevation 77.0 when the
 rotator sends one pulse per 0.5 degree (PH=PV=2):