diff --git a/WHATSNEW b/WHATSNEW
index 50ef40f54..b56993bb7 100644
--- a/WHATSNEW
+++ b/WHATSNEW
@@ -239,7 +239,10 @@ Fixed bugs:
   Bugzilla report 32667
 
 * untar would go into infinite loop for some invalid tar files.
-  Bugzill report 29877
+  Bugzilla report 29877
+
+* forked <javac> won't pass -source to a JDK 1.1 or 1.2 javac anymore.
+  Bugzilla report 32948
 
 Changes from Ant 1.6.1 to Ant 1.6.2
 ===================================
diff --git a/src/main/org/apache/tools/ant/taskdefs/compilers/JavacExternal.java b/src/main/org/apache/tools/ant/taskdefs/compilers/JavacExternal.java
index 3191c52a1..6c6bb0f73 100644
--- a/src/main/org/apache/tools/ant/taskdefs/compilers/JavacExternal.java
+++ b/src/main/org/apache/tools/ant/taskdefs/compilers/JavacExternal.java
@@ -1,5 +1,5 @@
 /*
- * Copyright  2001-2004 The Apache Software Foundation
+ * Copyright  2001-2005 The Apache Software Foundation
  *
  *  Licensed under the Apache License, Version 2.0 (the "License");
  *  you may not use this file except in compliance with the License.
@@ -42,7 +42,11 @@ public class JavacExternal extends DefaultCompilerAdapter {
 
         Commandline cmd = new Commandline();
         cmd.setExecutable(getJavac().getJavacExecutable());
-        setupModernJavacCommandlineSwitches(cmd);
+        if (!assumeJava11() && !assumeJava12()) {
+            setupModernJavacCommandlineSwitches(cmd);
+        } else {
+            setupJavacCommandlineSwitches(cmd, true);
+        }
         int firstFileName = assumeJava11() ? -1 : cmd.size();
         logAndAddFilesToCompile(cmd);
         //On VMS platform, we need to create a special java options file