diff --git a/src/main/org/apache/tools/ant/taskdefs/Javadoc.java b/src/main/org/apache/tools/ant/taskdefs/Javadoc.java
index 665f77ecb..4993400fc 100644
--- a/src/main/org/apache/tools/ant/taskdefs/Javadoc.java
+++ b/src/main/org/apache/tools/ant/taskdefs/Javadoc.java
@@ -448,7 +448,7 @@ public class Javadoc extends Exec {
     }
 
     public void execute() throws BuildException {
-        if (sourcePath == null && destDir == null ) {
+        if (sourcePath == null || destDir == null ) {
             String msg = "sourcePath and destDir attributes must be set!";
             throw new BuildException(msg);
         }