diff --git a/.idea/dictionaries/bmarty.xml b/.idea/dictionaries/bmarty.xml
index 5ad39614b7..16cc35cebe 100644
--- a/.idea/dictionaries/bmarty.xml
+++ b/.idea/dictionaries/bmarty.xml
@@ -24,6 +24,8 @@
       <w>pbkdf</w>
       <w>pids</w>
       <w>pkcs</w>
+      <w>previewable</w>
+      <w>previewables</w>
       <w>riotx</w>
       <w>signin</w>
       <w>signout</w>
diff --git a/vector/src/main/java/im/vector/app/features/attachments/ContentAttachmentData.kt b/vector/src/main/java/im/vector/app/features/attachments/ContentAttachmentData.kt
index bd13c0dac4..3ca4f1b13e 100644
--- a/vector/src/main/java/im/vector/app/features/attachments/ContentAttachmentData.kt
+++ b/vector/src/main/java/im/vector/app/features/attachments/ContentAttachmentData.kt
@@ -18,10 +18,12 @@ package im.vector.app.features.attachments
 
 import org.matrix.android.sdk.api.session.content.ContentAttachmentData
 
+private val listOfPreviewableMimeTypes = listOf("image/jpeg", "image/png", "image/jpg", "image/gif")
+
 fun ContentAttachmentData.isPreviewable(): Boolean {
     // For now the preview only supports still image
     return type == ContentAttachmentData.Type.IMAGE
-            && listOf("image/jpeg", "image/png", "image/jpg").contains(getSafeMimeType() ?: "")
+            && listOfPreviewableMimeTypes.contains(getSafeMimeType() ?: "")
 }
 
 data class GroupedContentAttachmentData(