diff --git a/app/src/main/java/com/geeksville/mesh/DataPacket.kt b/app/src/main/java/com/geeksville/mesh/DataPacket.kt
index 94c6d6f61..b855359bb 100644
--- a/app/src/main/java/com/geeksville/mesh/DataPacket.kt
+++ b/app/src/main/java/com/geeksville/mesh/DataPacket.kt
@@ -58,6 +58,7 @@ data class DataPacket(
     var status: MessageStatus? = MessageStatus.UNKNOWN,
     var hopLimit: Int = 0,
     var channel: Int = 0, // channel index
+    var wantAck: Boolean = true, // If true, the receiver should send an ack back
 ) : Parcelable {
 
     /**
@@ -118,6 +119,7 @@ data class DataPacket(
         parcel.readParcelableCompat(MessageStatus::class.java.classLoader),
         parcel.readInt(),
         parcel.readInt(),
+        parcel.readInt() == 1,
     )
 
     override fun equals(other: Any?): Boolean {
@@ -135,6 +137,7 @@ data class DataPacket(
         if (!bytes!!.contentEquals(other.bytes!!)) return false
         if (status != other.status) return false
         if (hopLimit != other.hopLimit) return false
+        if (wantAck != other.wantAck) return false
 
         return true
     }
@@ -149,6 +152,7 @@ data class DataPacket(
         result = 31 * result + status.hashCode()
         result = 31 * result + hopLimit
         result = 31 * result + channel
+        result = 31 * result + wantAck.hashCode()
         return result
     }
 
@@ -162,6 +166,7 @@ data class DataPacket(
         parcel.writeParcelable(status, flags)
         parcel.writeInt(hopLimit)
         parcel.writeInt(channel)
+        parcel.writeInt(if (wantAck) 1 else 0)
     }
 
     override fun describeContents(): Int {
@@ -179,6 +184,7 @@ data class DataPacket(
         status = parcel.readParcelableCompat(MessageStatus::class.java.classLoader)
         hopLimit = parcel.readInt()
         channel = parcel.readInt()
+        wantAck = parcel.readInt() == 1
     }
 
     companion object CREATOR : Parcelable.Creator<DataPacket> {
diff --git a/app/src/main/java/com/geeksville/mesh/service/MeshService.kt b/app/src/main/java/com/geeksville/mesh/service/MeshService.kt
index b9f944f33..2827bf9a7 100644
--- a/app/src/main/java/com/geeksville/mesh/service/MeshService.kt
+++ b/app/src/main/java/com/geeksville/mesh/service/MeshService.kt
@@ -655,6 +655,7 @@ class MeshService : Service(), Logging {
                 bytes = data.payload.toByteArray(),
                 hopLimit = packet.hopLimit,
                 channel = if (packet.pkiEncrypted) DataPacket.PKC_CHANNEL_INDEX else packet.channel,
+                wantAck = packet.wantAck,
             )
         }
     }
@@ -662,7 +663,7 @@ class MeshService : Service(), Logging {
     private fun toMeshPacket(p: DataPacket): MeshPacket {
         return newMeshPacketTo(p.to!!).buildMeshPacket(
             id = p.id,
-            wantAck = true,
+            wantAck = p.wantAck,
             hopLimit = p.hopLimit,
             channel = p.channel,
         ) {