diff --git a/src/main/java/org/thoughtcrime/securesms/ConversationActivity.java b/src/main/java/org/thoughtcrime/securesms/ConversationActivity.java
index 62a2b3f31..e31fa6dca 100644
--- a/src/main/java/org/thoughtcrime/securesms/ConversationActivity.java
+++ b/src/main/java/org/thoughtcrime/securesms/ConversationActivity.java
@@ -362,7 +362,11 @@ public class ConversationActivity extends PassphraseRequiredActionBarActivity
             for (int i = 0; i < uriCount; i++) {
               uriList.add(multipleUris.getItemAt(i).getUri());
             }
-            askSendingFiles(uriList, () -> SendRelayedMessageUtil.sendMultipleMsgs(this, chatId, uriList, null));
+            askSendingFiles(uriList, () -> {
+              Util.runOnAnyBackgroundThread(() -> {
+                SendRelayedMessageUtil.sendMultipleMsgs(this, chatId, uriList, null);
+              });
+            });
           }
         }
       }