diff --git a/nashorn/src/jdk/nashorn/internal/runtime/regexp/RegExpFactory.java b/nashorn/src/jdk/nashorn/internal/runtime/regexp/RegExpFactory.java
index 6ff66f21d05..4a7ac11bc99 100644
--- a/nashorn/src/jdk/nashorn/internal/runtime/regexp/RegExpFactory.java
+++ b/nashorn/src/jdk/nashorn/internal/runtime/regexp/RegExpFactory.java
@@ -40,7 +40,7 @@ public class RegExpFactory {
     private final static String JONI = "joni";
 
     static {
-        final String impl = Options.getStringProperty("nashorn.regexp.impl", JDK);
+        final String impl = Options.getStringProperty("nashorn.regexp.impl", JONI);
         switch (impl) {
             case JONI:
                 instance = new JoniRegExp.Factory();