diff --git a/src/main/org/apache/tools/ant/taskdefs/Javac.java b/src/main/org/apache/tools/ant/taskdefs/Javac.java
index 8db86a2a7..72abe3b2d 100644
--- a/src/main/org/apache/tools/ant/taskdefs/Javac.java
+++ b/src/main/org/apache/tools/ant/taskdefs/Javac.java
@@ -432,6 +432,9 @@ public class Javac extends MatchingTask {
 
     private void doModernCompile() throws BuildException {
         project.log("Performing a Modern Compile");
+        project.log("WARNING: Modern Compiler usage not implemented!");
+        project.log("Switching modes to Classic");
+        doClassicCompile();
     }
 
     /**