diff --git a/mongodb/src/main/java/com/yahoo/ycsb/db/OptionsSupport.java b/mongodb/src/main/java/com/yahoo/ycsb/db/OptionsSupport.java
index b8aa6f4d5ddd37d93c326c94a96664045faf1b54..a2e926d3fb4c37856b34eebc4d9842a14a2d214e 100644
--- a/mongodb/src/main/java/com/yahoo/ycsb/db/OptionsSupport.java
+++ b/mongodb/src/main/java/com/yahoo/ycsb/db/OptionsSupport.java
@@ -30,7 +30,7 @@ import java.util.Properties;
 public final class OptionsSupport {
 
     /** Value for an unavailable property. */
-    protected static final String UNAVAILABLE = "n/a";
+    private static final String UNAVAILABLE = "n/a";
 
     /**
      * Updates the URL with the appropriate attributes if legacy properties are