diff --git a/repository/src/main/java/org/alfresco/repo/content/transform/RemoteTransformerClient.java b/repository/src/main/java/org/alfresco/repo/content/transform/RemoteTransformerClient.java
index 601ed568c6..d3de3e16b7 100644
--- a/repository/src/main/java/org/alfresco/repo/content/transform/RemoteTransformerClient.java
+++ b/repository/src/main/java/org/alfresco/repo/content/transform/RemoteTransformerClient.java
@@ -340,7 +340,7 @@ public class RemoteTransformerClient
         ContentType contentType = ContentType.create(sourceMimetype);
         if (StringUtils.isEmpty(filename))
         {
-            builder.addBinaryBody("file", contentStream, contentType, "tmp" + sourceExtension);
+            builder.addBinaryBody("file", contentStream, contentType, "tmp." + sourceExtension);
         }
         else
         {