diff --git a/sys/dev/mpr/mpr_user.c b/sys/dev/mpr/mpr_user.c
index 236e5c9715df..cab865e2e535 100644
--- a/sys/dev/mpr/mpr_user.c
+++ b/sys/dev/mpr/mpr_user.c
@@ -2226,7 +2226,7 @@ mpr_user_btdh(struct mpr_softc *sc, mpr_btdh_mapping_t *data)
 		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);
diff --git a/sys/dev/mps/mps_user.c b/sys/dev/mps/mps_user.c
index c80fbc68cdf3..9d4aab54562f 100644
--- a/sys/dev/mps/mps_user.c
+++ b/sys/dev/mps/mps_user.c
@@ -2128,7 +2128,7 @@ mps_user_btdh(struct mps_softc *sc, mps_btdh_mapping_t *data)
 		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);