diff --git a/solr/solrj/src/java/org/apache/solr/client/solrj/impl/HttpSolrClient.java b/solr/solrj/src/java/org/apache/solr/client/solrj/impl/HttpSolrClient.java
index c1e95763ea1..6ea42016cfc 100644
--- a/solr/solrj/src/java/org/apache/solr/client/solrj/impl/HttpSolrClient.java
+++ b/solr/solrj/src/java/org/apache/solr/client/solrj/impl/HttpSolrClient.java
@@ -421,7 +421,7 @@ public class HttpSolrClient extends SolrClient {
             parts.add(new FormBodyPart(name,
                 new InputStreamBody(
                     content.getStream(),
-                    contentType,
+                    ContentType.parse(contentType),
                     content.getName())));
           }
         }