diff --git a/wifi/1.0/default/Android.mk b/wifi/1.0/default/Android.mk
index 382d350..f0c78ea 100644
--- a/wifi/1.0/default/Android.mk
+++ b/wifi/1.0/default/Android.mk
@@ -24,6 +24,7 @@
     wifi_ap_iface.cpp \
     wifi_chip.cpp \
     wifi_legacy_hal.cpp \
+    wifi_legacy_hal_stubs.cpp \
     wifi_mode_controller.cpp \
     wifi_nan_iface.cpp \
     wifi_p2p_iface.cpp \
diff --git a/wifi/1.0/default/wifi_legacy_hal.cpp b/wifi/1.0/default/wifi_legacy_hal.cpp
index 9234382..d7a1f15 100644
--- a/wifi/1.0/default/wifi_legacy_hal.cpp
+++ b/wifi/1.0/default/wifi_legacy_hal.cpp
@@ -20,8 +20,7 @@
 #include <cutils/properties.h>
 
 #include "wifi_legacy_hal.h"
-
-using android::wifi_system::InterfaceTool;
+#include "wifi_legacy_hal_stubs.h"
 
 namespace android {
 namespace hardware {
@@ -256,6 +255,10 @@
   LOG(DEBUG) << "Initialize legacy HAL";
   // TODO: Add back the HAL Tool if we need to. All we need from the HAL tool
   // for now is this function call which we can directly call.
+  if (!initHalFuncTableWithStubs(&global_func_table_)) {
+    LOG(ERROR) << "Failed to initialize legacy hal function table with stubs";
+    return WIFI_ERROR_UNKNOWN;
+  }
   wifi_error status = init_wifi_vendor_hal_func_table(&global_func_table_);
   if (status != WIFI_SUCCESS) {
     LOG(ERROR) << "Failed to initialize legacy hal function table";
diff --git a/wifi/1.0/default/wifi_legacy_hal.h b/wifi/1.0/default/wifi_legacy_hal.h
index 27ffa71..07bc93a 100644
--- a/wifi/1.0/default/wifi_legacy_hal.h
+++ b/wifi/1.0/default/wifi_legacy_hal.h
@@ -14,8 +14,8 @@
  * limitations under the License.
  */
 
-#ifndef WIFI_LEGACY_WIFI_HAL_H_
-#define WIFI_LEGACY_WIFI_HAL_H_
+#ifndef WIFI_LEGACY_HAL_H_
+#define WIFI_LEGACY_HAL_H_
 
 #include <functional>
 #include <thread>
@@ -270,4 +270,4 @@
 }  // namespace hardware
 }  // namespace android
 
-#endif  // WIFI_LEGACY_WIFI_HAL_H_
+#endif  // WIFI_LEGACY_HAL_H_
diff --git a/wifi/1.0/default/wifi_legacy_hal_stubs.cpp b/wifi/1.0/default/wifi_legacy_hal_stubs.cpp
new file mode 100644
index 0000000..2973430
--- /dev/null
+++ b/wifi/1.0/default/wifi_legacy_hal_stubs.cpp
@@ -0,0 +1,142 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "wifi_legacy_hal_stubs.h"
+
+// TODO: Remove these stubs from HalTool in libwifi-system.
+namespace android {
+namespace hardware {
+namespace wifi {
+namespace V1_0 {
+namespace implementation {
+namespace legacy_hal {
+template <typename>
+struct stubFunction;
+
+template <typename R, typename... Args>
+struct stubFunction<R (*)(Args...)> {
+  static constexpr R invoke(Args...) { return WIFI_ERROR_NOT_SUPPORTED; }
+};
+template <typename... Args>
+struct stubFunction<void (*)(Args...)> {
+  static constexpr void invoke(Args...) {}
+};
+
+template <typename T>
+void populateStubFor(T* val) {
+  *val = &stubFunction<T>::invoke;
+}
+
+bool initHalFuncTableWithStubs(wifi_hal_fn* hal_fn) {
+  if (hal_fn == nullptr) {
+    return false;
+  }
+  populateStubFor(&hal_fn->wifi_initialize);
+  populateStubFor(&hal_fn->wifi_cleanup);
+  populateStubFor(&hal_fn->wifi_event_loop);
+  populateStubFor(&hal_fn->wifi_get_error_info);
+  populateStubFor(&hal_fn->wifi_get_supported_feature_set);
+  populateStubFor(&hal_fn->wifi_get_concurrency_matrix);
+  populateStubFor(&hal_fn->wifi_set_scanning_mac_oui);
+  populateStubFor(&hal_fn->wifi_get_supported_channels);
+  populateStubFor(&hal_fn->wifi_is_epr_supported);
+  populateStubFor(&hal_fn->wifi_get_ifaces);
+  populateStubFor(&hal_fn->wifi_get_iface_name);
+  populateStubFor(&hal_fn->wifi_set_iface_event_handler);
+  populateStubFor(&hal_fn->wifi_reset_iface_event_handler);
+  populateStubFor(&hal_fn->wifi_start_gscan);
+  populateStubFor(&hal_fn->wifi_stop_gscan);
+  populateStubFor(&hal_fn->wifi_get_cached_gscan_results);
+  populateStubFor(&hal_fn->wifi_set_bssid_hotlist);
+  populateStubFor(&hal_fn->wifi_reset_bssid_hotlist);
+  populateStubFor(&hal_fn->wifi_set_significant_change_handler);
+  populateStubFor(&hal_fn->wifi_reset_significant_change_handler);
+  populateStubFor(&hal_fn->wifi_get_gscan_capabilities);
+  populateStubFor(&hal_fn->wifi_set_link_stats);
+  populateStubFor(&hal_fn->wifi_get_link_stats);
+  populateStubFor(&hal_fn->wifi_clear_link_stats);
+  populateStubFor(&hal_fn->wifi_get_valid_channels);
+  populateStubFor(&hal_fn->wifi_rtt_range_request);
+  populateStubFor(&hal_fn->wifi_rtt_range_cancel);
+  populateStubFor(&hal_fn->wifi_get_rtt_capabilities);
+  populateStubFor(&hal_fn->wifi_rtt_get_responder_info);
+  populateStubFor(&hal_fn->wifi_enable_responder);
+  populateStubFor(&hal_fn->wifi_disable_responder);
+  populateStubFor(&hal_fn->wifi_set_nodfs_flag);
+  populateStubFor(&hal_fn->wifi_start_logging);
+  populateStubFor(&hal_fn->wifi_set_epno_list);
+  populateStubFor(&hal_fn->wifi_reset_epno_list);
+  populateStubFor(&hal_fn->wifi_set_country_code);
+  populateStubFor(&hal_fn->wifi_get_firmware_memory_dump);
+  populateStubFor(&hal_fn->wifi_set_log_handler);
+  populateStubFor(&hal_fn->wifi_reset_log_handler);
+  populateStubFor(&hal_fn->wifi_set_alert_handler);
+  populateStubFor(&hal_fn->wifi_reset_alert_handler);
+  populateStubFor(&hal_fn->wifi_get_firmware_version);
+  populateStubFor(&hal_fn->wifi_get_ring_buffers_status);
+  populateStubFor(&hal_fn->wifi_get_logger_supported_feature_set);
+  populateStubFor(&hal_fn->wifi_get_ring_data);
+  populateStubFor(&hal_fn->wifi_enable_tdls);
+  populateStubFor(&hal_fn->wifi_disable_tdls);
+  populateStubFor(&hal_fn->wifi_get_tdls_status);
+  populateStubFor(&hal_fn->wifi_get_tdls_capabilities);
+  populateStubFor(&hal_fn->wifi_get_driver_version);
+  populateStubFor(&hal_fn->wifi_set_passpoint_list);
+  populateStubFor(&hal_fn->wifi_reset_passpoint_list);
+  populateStubFor(&hal_fn->wifi_set_lci);
+  populateStubFor(&hal_fn->wifi_set_lcr);
+  populateStubFor(&hal_fn->wifi_start_sending_offloaded_packet);
+  populateStubFor(&hal_fn->wifi_stop_sending_offloaded_packet);
+  populateStubFor(&hal_fn->wifi_start_rssi_monitoring);
+  populateStubFor(&hal_fn->wifi_stop_rssi_monitoring);
+  populateStubFor(&hal_fn->wifi_get_wake_reason_stats);
+  populateStubFor(&hal_fn->wifi_configure_nd_offload);
+  populateStubFor(&hal_fn->wifi_get_driver_memory_dump);
+  populateStubFor(&hal_fn->wifi_start_pkt_fate_monitoring);
+  populateStubFor(&hal_fn->wifi_get_tx_pkt_fates);
+  populateStubFor(&hal_fn->wifi_get_rx_pkt_fates);
+  populateStubFor(&hal_fn->wifi_nan_enable_request);
+  populateStubFor(&hal_fn->wifi_nan_disable_request);
+  populateStubFor(&hal_fn->wifi_nan_publish_request);
+  populateStubFor(&hal_fn->wifi_nan_publish_cancel_request);
+  populateStubFor(&hal_fn->wifi_nan_subscribe_request);
+  populateStubFor(&hal_fn->wifi_nan_subscribe_cancel_request);
+  populateStubFor(&hal_fn->wifi_nan_transmit_followup_request);
+  populateStubFor(&hal_fn->wifi_nan_stats_request);
+  populateStubFor(&hal_fn->wifi_nan_config_request);
+  populateStubFor(&hal_fn->wifi_nan_tca_request);
+  populateStubFor(&hal_fn->wifi_nan_beacon_sdf_payload_request);
+  populateStubFor(&hal_fn->wifi_nan_register_handler);
+  populateStubFor(&hal_fn->wifi_nan_get_version);
+  populateStubFor(&hal_fn->wifi_nan_get_capabilities);
+  populateStubFor(&hal_fn->wifi_nan_data_interface_create);
+  populateStubFor(&hal_fn->wifi_nan_data_interface_delete);
+  populateStubFor(&hal_fn->wifi_nan_data_request_initiator);
+  populateStubFor(&hal_fn->wifi_nan_data_indication_response);
+  populateStubFor(&hal_fn->wifi_nan_data_end);
+  populateStubFor(&hal_fn->wifi_get_packet_filter_capabilities);
+  populateStubFor(&hal_fn->wifi_set_packet_filter);
+  populateStubFor(&hal_fn->wifi_get_roaming_capabilities);
+  populateStubFor(&hal_fn->wifi_enable_firmware_roaming);
+  populateStubFor(&hal_fn->wifi_configure_roaming);
+  return true;
+}
+}  // namespace legacy_hal
+}  // namespace implementation
+}  // namespace V1_0
+}  // namespace wifi
+}  // namespace hardware
+}  // namespace android
diff --git a/wifi/1.0/default/wifi_legacy_hal_stubs.h b/wifi/1.0/default/wifi_legacy_hal_stubs.h
new file mode 100644
index 0000000..1cb5f9d
--- /dev/null
+++ b/wifi/1.0/default/wifi_legacy_hal_stubs.h
@@ -0,0 +1,36 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef WIFI_LEGACY_HAL_STUBS_H_
+#define WIFI_LEGACY_HAL_STUBS_H_
+
+namespace android {
+namespace hardware {
+namespace wifi {
+namespace V1_0 {
+namespace implementation {
+namespace legacy_hal {
+#include <hardware_legacy/wifi_hal.h>
+
+bool initHalFuncTableWithStubs(wifi_hal_fn* hal_fn);
+}  // namespace legacy_hal
+}  // namespace implementation
+}  // namespace V1_0
+}  // namespace wifi
+}  // namespace hardware
+}  // namespace android
+
+#endif  // WIFI_LEGACY_HAL_STUBS_H_