diff --git a/identifier-extractor/merge.php b/identifier-extractor/merge.php
index 51072e0d03..2b09487bd1 100644
--- a/identifier-extractor/merge.php
+++ b/identifier-extractor/merge.php
@@ -59,4 +59,6 @@
 	}
 }
 
+ksort($dataByIdentifier);
+
 echo Json::encode($dataByIdentifier, true);