diff --git a/src/rf_mapper/database.py b/src/rf_mapper/database.py
index 19bb8a6..ef73db4 100644
--- a/src/rf_mapper/database.py
+++ b/src/rf_mapper/database.py
@@ -340,6 +340,11 @@ class DeviceDatabase:
         cursor = conn.cursor()
         timestamp = datetime.now().isoformat()
 
+        # Skip if this is a known scanner's BT MAC (don't record scanners as devices)
+        cursor.execute("SELECT 1 FROM peers WHERE UPPER(bt_mac) = UPPER(?)", (address,))
+        if cursor.fetchone():
+            return  # Skip scanner device
+
         # Get previous observation for movement detection
         cursor.execute("""
             SELECT rssi, distance_m, timestamp FROM rssi_history