diff --git a/src/main/java/org/elasticsearch/common/lucene/search/MoreLikeThisQuery.java b/src/main/java/org/elasticsearch/common/lucene/search/MoreLikeThisQuery.java
index 8356f62af58c7..cae14843d2a73 100644
--- a/src/main/java/org/elasticsearch/common/lucene/search/MoreLikeThisQuery.java
+++ b/src/main/java/org/elasticsearch/common/lucene/search/MoreLikeThisQuery.java
@@ -81,6 +81,8 @@ public Query rewrite(IndexReader reader) throws IOException {
         BooleanClause[] clauses = bq.getClauses();
 
         bq.setMinimumNumberShouldMatch((int) (clauses.length * percentTermsToMatch));
+
+        bq.setBoost(getBoost());
         return bq;
     }
 
diff --git a/src/main/java/org/elasticsearch/index/query/MoreLikeThisFieldQueryParser.java b/src/main/java/org/elasticsearch/index/query/MoreLikeThisFieldQueryParser.java
index 69c95455f4f71..aa5af80a20aa8 100644
--- a/src/main/java/org/elasticsearch/index/query/MoreLikeThisFieldQueryParser.java
+++ b/src/main/java/org/elasticsearch/index/query/MoreLikeThisFieldQueryParser.java
@@ -92,6 +92,8 @@ public Query parse(QueryParseContext parseContext) throws IOException, QueryPars
                     mltQuery.setPercentTermsToMatch(parser.floatValue());
                 } else if ("analyzer".equals(currentFieldName)) {
                     analyzer = parseContext.analysisService().analyzer(parser.text());
+                } else if ("boost".equals(currentFieldName)) {
+                    mltQuery.setBoost(parser.floatValue());
                 } else {
                     throw new QueryParsingException(parseContext.index(), "[mlt_field] query does not support [" + currentFieldName + "]");
                 }
diff --git a/src/main/java/org/elasticsearch/index/query/MoreLikeThisQueryParser.java b/src/main/java/org/elasticsearch/index/query/MoreLikeThisQueryParser.java
index 3a5afcdca50db..0a77a0ad2f468 100644
--- a/src/main/java/org/elasticsearch/index/query/MoreLikeThisQueryParser.java
+++ b/src/main/java/org/elasticsearch/index/query/MoreLikeThisQueryParser.java
@@ -83,6 +83,8 @@ public Query parse(QueryParseContext parseContext) throws IOException, QueryPars
                     mltQuery.setPercentTermsToMatch(parser.floatValue());
                 } else if ("analyzer".equals(currentFieldName)) {
                     analyzer = parseContext.analysisService().analyzer(parser.text());
+                } else if ("boost".equals(currentFieldName)) {
+                    mltQuery.setBoost(parser.floatValue());
                 } else {
                     throw new QueryParsingException(parseContext.index(), "[mlt] query does not support [" + currentFieldName + "]");
                 }