1 files changed, 1 insertions, 1 deletions
diff --git a/src/main/java/org/traccar/model/WifiAccessPoint.java b/src/main/java/org/traccar/model/WifiAccessPoint.java
index e28c1b935..64858f4c7 100644
--- a/src/main/java/org/traccar/model/WifiAccessPoint.java
+++ b/src/main/java/org/traccar/model/WifiAccessPoint.java
@@ -52,7 +52,7 @@ public class WifiAccessPoint {
     }
 
     public void setSignalStrength(Integer signalStrength) {
-        this.signalStrength = signalStrength;
+        this.signalStrength = signalStrength > 0 ? -signalStrength : signalStrength;
     }
 
     private Integer channel;