diff --git a/devicetypes/smartthings/zwave-lock.src/zwave-lock.groovy b/devicetypes/smartthings/zwave-lock.src/zwave-lock.groovy
index 0535ffa..948bcc7 100644
--- a/devicetypes/smartthings/zwave-lock.src/zwave-lock.groovy
+++ b/devicetypes/smartthings/zwave-lock.src/zwave-lock.groovy
@@ -41,6 +41,7 @@ metadata {
 				attributeState "locked", label:'locked', action:"lock.unlock", icon:"st.locks.lock.locked", backgroundColor:"#79b821", nextState:"unlocking"
 				attributeState "unlocked", label:'unlocked', action:"lock.lock", icon:"st.locks.lock.unlocked", backgroundColor:"#ffffff", nextState:"locking"
 				attributeState "unknown", label:"unknown", action:"lock.lock", icon:"st.locks.lock.unknown", backgroundColor:"#ffffff", nextState:"locking"
+				attributeState "jammed", label:"jammed", action:"lock.locl", icon:"st.locks.lock.unknown", backgroundColor:"#ffffff", nextState:"locking"
 				attributeState "locking", label:'locking', icon:"st.locks.lock.locked", backgroundColor:"#79b821"
 				attributeState "unlocking", label:'unlocking', icon:"st.locks.lock.unlocked", backgroundColor:"#ffffff"
 			}
@@ -130,7 +131,7 @@ def zwaveEvent(DoorLockOperationReport cmd) {
 	if (cmd.doorLockMode == 0xFF) {
 		map.value = "locked"
 	} else if (cmd.doorLockMode >= 0x40) {
-		map.value = "unknown"
+		map.value = "unknown" // XXX: Jammed?
 	} else if (cmd.doorLockMode & 1) {
 		map.value = "unlocked with timeout"
 	} else {
@@ -180,7 +181,7 @@ def zwaveEvent(physicalgraph.zwave.commands.alarmv2.AlarmReport cmd) {
 				map = [ name: "lock", value: "unknown", descriptionText: "$device.displayName was not locked fully" ]
 				break
 			case 0xB:
-				map = [ name: "lock", value: "unknown", descriptionText: "$device.displayName is jammed" ]
+				map = [ name: "lock", value: "jammed", descriptionText: "$device.displayName is jammed" ]
 				break
 			case 0xC:
 				map = [ name: "codeChanged", value: "all", descriptionText: "$device.displayName: all user codes deleted", isStateChange: true ]
@@ -266,7 +267,7 @@ def zwaveEvent(physicalgraph.zwave.commands.alarmv2.AlarmReport cmd) {
 		case 17:
 		case 23:
 		case 26:
-			map = [ name: "lock", value: "unknown", descriptionText: "$device.displayName bolt is jammed" ]
+			map = [ name: "lock", value: "jammed", descriptionText: "$device.displayName bolt is jammed" ]
 			break
 		case 13:
 			map = [ name: "codeChanged", value: cmd.alarmLevel, descriptionText: "$device.displayName code $cmd.alarmLevel was added", isStateChange: true ]