diff --git a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/colmi/ColmiR0xDeviceSupport.java b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/colmi/ColmiR0xDeviceSupport.java
index 646777ce4..1c3cd3246 100644
--- a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/colmi/ColmiR0xDeviceSupport.java
+++ b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/colmi/ColmiR0xDeviceSupport.java
@@ -343,6 +343,7 @@ public class ColmiR0xDeviceSupport extends AbstractBTLEDeviceSupport {
             // Big data responses can arrive in multiple packets that need to be concatenated
             if (bigDataPacket != null) {
                 LOG.debug("Received {} bytes on big data characteristic while waiting for follow-up data", value.length);
+                bigDataPacket.rewind();
                 ByteBuffer concatenated = ByteBuffer
                         .allocate(bigDataPacket.limit() + value.length)
                         .put(bigDataPacket)