diff --git a/bundles/org.openhab.binding.sonyprojector/src/main/java/org/openhab/binding/sonyprojector/internal/communication/sdcp/SonyProjectorSdcpConnector.java b/bundles/org.openhab.binding.sonyprojector/src/main/java/org/openhab/binding/sonyprojector/internal/communication/sdcp/SonyProjectorSdcpConnector.java
index bc0678df8e7..249b502e961 100644
--- a/bundles/org.openhab.binding.sonyprojector/src/main/java/org/openhab/binding/sonyprojector/internal/communication/sdcp/SonyProjectorSdcpConnector.java
+++ b/bundles/org.openhab.binding.sonyprojector/src/main/java/org/openhab/binding/sonyprojector/internal/communication/sdcp/SonyProjectorSdcpConnector.java
@@ -326,8 +326,8 @@ public class SonyProjectorSdcpConnector extends SonyProjectorConnector {
             if (!macAddress.isEmpty()) {
                 macAddress = macAddress + "-";
             }
-            macAddress = macAddress + Integer.toHexString(macByte);
+            macAddress = macAddress + String.format("%02x", macByte);
         }
-        return macAddress.toLowerCase();
+        return macAddress;
     }
 }