diff --git a/vector/src/main/java/im/vector/app/features/media/VectorAttachmentViewerActivity.kt b/vector/src/main/java/im/vector/app/features/media/VectorAttachmentViewerActivity.kt
index 4105a1c55f..e7f4806e31 100644
--- a/vector/src/main/java/im/vector/app/features/media/VectorAttachmentViewerActivity.kt
+++ b/vector/src/main/java/im/vector/app/features/media/VectorAttachmentViewerActivity.kt
@@ -70,7 +70,7 @@ class VectorAttachmentViewerActivity : AttachmentViewerActivity(), BaseAttachmen
     private var initialIndex = 0
     private var isAnimatingOut = false
 
-    private var currentSourceProvider: BaseAttachmentProvider? = null
+    private var currentSourceProvider: BaseAttachmentProvider<*>? = null
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)