Index: sys/dev/mpr/mpr_user.c
===================================================================
--- sys/dev/mpr/mpr_user.c
+++ sys/dev/mpr/mpr_user.c
@@ -2226,7 +2226,7 @@
 		if (bus != 0)
 			return (EINVAL);
 
-		if (target > sc->max_devices) {
+		if (target >= sc->max_devices) {
 			mpr_dprint(sc, MPR_XINFO, "Target ID is out of range "
 			   "for Bus/Target to DevHandle mapping.");
 			return (EINVAL);
Index: sys/dev/mps/mps_user.c
===================================================================
--- sys/dev/mps/mps_user.c
+++ sys/dev/mps/mps_user.c
@@ -2128,7 +2128,7 @@
 		if (bus != 0)
 			return (EINVAL);
 
-		if (target > sc->max_devices) {
+		if (target >= sc->max_devices) {
 			mps_dprint(sc, MPS_FAULT, "Target ID is out of range "
 			   "for Bus/Target to DevHandle mapping.");
 			return (EINVAL);