diff --git a/test/java/src/TestServer.java b/test/java/src/TestServer.java
index 7418cbb..8e3e4ed 100644
--- a/test/java/src/TestServer.java
+++ b/test/java/src/TestServer.java
@@ -45,6 +45,11 @@
       System.out.print("testI64(" + thing + ")\n");
       return thing;
     }
+
+    public double testDouble(double thing) {
+      System.out.print("testDouble(" + thing + ")\n");
+      return thing;
+    }
   
     public Xtruct testStruct(Xtruct thing) {
       System.out.print("testStruct({" +