diff --git a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/casio/gbx100/CasioGBX100DeviceSupport.java b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/casio/gbx100/CasioGBX100DeviceSupport.java
index 3130d72ae..02d2f525e 100644
--- a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/casio/gbx100/CasioGBX100DeviceSupport.java
+++ b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/casio/gbx100/CasioGBX100DeviceSupport.java
@@ -300,7 +300,7 @@ public class CasioGBX100DeviceSupport extends Casio2C2DSupport implements Shared
         // If not a call or email, check the sender and if null, promote the title and message preview
         // as subtitle
         if (showMessagePreview && icon != CasioConstants.CATEGORY_INCOMING_CALL && icon != CasioConstants.CATEGORY_EMAIL) {
-            if (!StringUtils.isNullOrEmpty(sender)) {
+            if (StringUtils.isNullOrEmpty(sender)) {
                 // Shift title to sender slot
                 sender = title;
             }