diff --git a/contexthub/1.0/Android.mk b/contexthub/1.0/Android.mk
index 1286e66..c73c5c4 100644
--- a/contexthub/1.0/Android.mk
+++ b/contexthub/1.0/Android.mk
@@ -74,6 +74,25 @@
 LOCAL_GENERATED_SOURCES += $(GEN)
 
 #
+# Build types.hal (HostEndPoint)
+#
+GEN := $(intermediates)/android/hardware/contexthub/V1_0/HostEndPoint.java
+$(GEN): $(HIDL)
+$(GEN): PRIVATE_HIDL := $(HIDL)
+$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/types.hal
+$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
+$(GEN): PRIVATE_CUSTOM_TOOL = \
+        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
+        -Ljava \
+        -randroid.hardware:hardware/interfaces \
+        -randroid.hidl:system/libhidl/transport \
+        android.hardware.contexthub@1.0::types.HostEndPoint
+
+$(GEN): $(LOCAL_PATH)/types.hal
+	$(transform-generated-source)
+LOCAL_GENERATED_SOURCES += $(GEN)
+
+#
 # Build types.hal (HubAppInfo)
 #
 GEN := $(intermediates)/android/hardware/contexthub/V1_0/HubAppInfo.java
@@ -381,6 +400,25 @@
 LOCAL_GENERATED_SOURCES += $(GEN)
 
 #
+# Build types.hal (HostEndPoint)
+#
+GEN := $(intermediates)/android/hardware/contexthub/V1_0/HostEndPoint.java
+$(GEN): $(HIDL)
+$(GEN): PRIVATE_HIDL := $(HIDL)
+$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/types.hal
+$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
+$(GEN): PRIVATE_CUSTOM_TOOL = \
+        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
+        -Ljava \
+        -randroid.hardware:hardware/interfaces \
+        -randroid.hidl:system/libhidl/transport \
+        android.hardware.contexthub@1.0::types.HostEndPoint
+
+$(GEN): $(LOCAL_PATH)/types.hal
+	$(transform-generated-source)
+LOCAL_GENERATED_SOURCES += $(GEN)
+
+#
 # Build types.hal (HubAppInfo)
 #
 GEN := $(intermediates)/android/hardware/contexthub/V1_0/HubAppInfo.java
diff --git a/contexthub/1.0/types.hal b/contexthub/1.0/types.hal
index 2a58c0b..d7e5673 100644
--- a/contexthub/1.0/types.hal
+++ b/contexthub/1.0/types.hal
@@ -30,6 +30,20 @@
     ENCRYPTED = (1<<1),// Encrypted nanoapp
 };
 
+enum HostEndPoint : uint16_t {
+    BROADCAST = 0xFFFF, // The message endpoint is a broadcast end point.
+                        // This value must never be used for a message from
+                        // the host to the hub.
+                        // If BROADCAST is specified as a destination for a
+                        // message from the context hub to the ContextHub
+                        // service, the message must be broadcast to all
+                        // registered clients by the Context Hub service.
+    UNSPECIFIED = 0xFFFE, // The message endpoint is unspecified. This value
+                          // must not be used for messages from the hub to host.
+                          // This value may be used for messages from the host
+                          // to the hub.
+};
+
 struct NanoAppBinary {
     uint32_t headerVersion;    // 0x1 for this version
     uint32_t magic;            // "NANO"
@@ -117,9 +131,10 @@
 };
 
 struct ContextHubMsg {
-    uint64_t appName; // Intended recipient (appId)
-    uint32_t msgType; // Identifier for message
-    vec<uint8_t> msg; // Message body
+    uint64_t appName;      // Intended recipient (appId)
+    uint16_t hostEndPoint; // identifier for the endpoint. (also see enum HostEndPoint)
+    uint32_t msgType;      // Identifier for message
+    vec<uint8_t> msg;      // Message body
 };
 
 enum HubMemoryType : uint32_t {