diff --git a/core/src/main/groovy/com/muwire/core/files/HasherService.groovy b/core/src/main/groovy/com/muwire/core/files/HasherService.groovy
index 7f2d779e..43d0f3a5 100644
--- a/core/src/main/groovy/com/muwire/core/files/HasherService.groovy
+++ b/core/src/main/groovy/com/muwire/core/files/HasherService.groovy
@@ -45,6 +45,8 @@ class HasherService {
             return
         if (canonical.isFile() && fileManager.negativeTree.fileToNode.containsKey(canonical))
             return
+        if (canonical.getName().endsWith(".mwcollection"))
+            return
         if (canonical.getName().endsWith(".mwcomment")) { 
             if (canonical.length() <= Constants.MAX_COMMENT_LENGTH)
                 eventBus.publish(new SideCarFileEvent(file : canonical))