diff --git a/vector/src/main/java/im/vector/app/features/home/room/detail/timeline/helper/PollResponseDataFactory.kt b/vector/src/main/java/im/vector/app/features/home/room/detail/timeline/helper/PollResponseDataFactory.kt
index 533397b4d8..0ef60da6de 100644
--- a/vector/src/main/java/im/vector/app/features/home/room/detail/timeline/helper/PollResponseDataFactory.kt
+++ b/vector/src/main/java/im/vector/app/features/home/room/detail/timeline/helper/PollResponseDataFactory.kt
@@ -44,7 +44,8 @@ class PollResponseDataFactory @Inject constructor(
                         )
                     },
                     winnerVoteCount = it.aggregatedContent?.winnerVoteCount ?: 0,
-                    totalVotes = it.aggregatedContent?.totalVotes ?: 0
+                    totalVotes = it.aggregatedContent?.totalVotes ?: 0,
+                    hasDecryptionError = it.encryptedRelatedEventIds.isNotEmpty(),
             )
         }
     }