diff --git a/libraries/Zigbee/src/ZigbeeCore.cpp b/libraries/Zigbee/src/ZigbeeCore.cpp
index 90b29cf9d0a..110b4bf2c93 100644
--- a/libraries/Zigbee/src/ZigbeeCore.cpp
+++ b/libraries/Zigbee/src/ZigbeeCore.cpp
@@ -515,8 +515,14 @@ void ZigbeeCore::scanNetworks(u_int32_t channel_mask, u_int8_t scan_duration) {
     log_e("Zigbee stack is not started, cannot scan networks");
     return;
   }
+  if (_scan_status == ZB_SCAN_RUNNING) {
+    log_w("Scan already in progress, ignoring new scan request");
+    return;
+  }
   log_v("Scanning Zigbee networks");
+  esp_zb_lock_acquire(portMAX_DELAY);
   esp_zb_zdo_active_scan_request(channel_mask, scan_duration, scanCompleteCallback);
+  esp_zb_lock_release();
   _scan_status = ZB_SCAN_RUNNING;
 }