1 files changed, 3 insertions, 1 deletions
diff --git a/linguistics/src/main/java/com/yahoo/language/process/StemList.java b/linguistics/src/main/java/com/yahoo/language/process/StemList.java
index a38a2e51cb6..d5451e7660d 100644
--- a/linguistics/src/main/java/com/yahoo/language/process/StemList.java
+++ b/linguistics/src/main/java/com/yahoo/language/process/StemList.java
@@ -3,6 +3,7 @@ package com.yahoo.language.process;
 
 import java.util.AbstractList;
 import java.util.ArrayList;
+import java.util.List;
 
 /**
  * A list of strings which does not allow for duplicate elements.
@@ -10,7 +11,8 @@ import java.util.ArrayList;
  * @author steinar
  */
 public class StemList extends AbstractList<String> {
-    private final ArrayList<String> stems;
+
+    private final List<String> stems;
 
     public StemList() {
         this(new String[0]);