diff --git a/vector/src/main/java/im/vector/app/features/home/room/detail/timeline/reactions/ReactionInfoSimpleItem.kt b/vector/src/main/java/im/vector/app/features/home/room/detail/timeline/reactions/ReactionInfoSimpleItem.kt
index 821abafffa..793150df70 100644
--- a/vector/src/main/java/im/vector/app/features/home/room/detail/timeline/reactions/ReactionInfoSimpleItem.kt
+++ b/vector/src/main/java/im/vector/app/features/home/room/detail/timeline/reactions/ReactionInfoSimpleItem.kt
@@ -25,6 +25,7 @@ import im.vector.app.R
 import im.vector.app.core.epoxy.ClickListener
 import im.vector.app.core.epoxy.VectorEpoxyHolder
 import im.vector.app.core.epoxy.onClick
+import im.vector.app.core.epoxy.util.preventMutation
 
 /**
  * Item displaying an emoji reaction (single line with emoji, author, time)
@@ -46,7 +47,7 @@ abstract class ReactionInfoSimpleItem : EpoxyModelWithHolder<ReactionInfoSimpleI
 
     override fun bind(holder: Holder) {
         super.bind(holder)
-        holder.emojiReactionView.text = reactionKey
+        holder.emojiReactionView.text = reactionKey.preventMutation()
         holder.displayNameView.text = authorDisplayName
         timeStamp?.let {
             holder.timeStampView.text = it