diff --git a/src/main/org/apache/tools/ant/taskdefs/DefBase.java b/src/main/org/apache/tools/ant/taskdefs/DefBase.java
index a34c5e6a1..e046f725e 100644
--- a/src/main/org/apache/tools/ant/taskdefs/DefBase.java
+++ b/src/main/org/apache/tools/ant/taskdefs/DefBase.java
@@ -94,7 +94,7 @@ public abstract class DefBase extends Task implements AntlibInterface {
             uri = "";
         }
         if (uri.startsWith("ant:") && !uri.startsWith("antlib:")) {
-            throw new BuildException("Attempt to use use a reserved URI " + uri);
+            throw new BuildException("Attempt to use a reserved URI " + uri);
         }
         this.uri = uri;
     }
diff --git a/src/testcases/org/apache/tools/ant/taskdefs/XmlnsTest.java b/src/testcases/org/apache/tools/ant/taskdefs/XmlnsTest.java
index fab30370b..19b0c2afb 100644
--- a/src/testcases/org/apache/tools/ant/taskdefs/XmlnsTest.java
+++ b/src/testcases/org/apache/tools/ant/taskdefs/XmlnsTest.java
@@ -85,7 +85,7 @@ public class XmlnsTest extends BuildFileTest {
     public void testExcluded() {
         expectBuildExceptionContaining(
             "excluded", "excluded uri",
-            "Attempt to use use a reserved URI ant:notallowed");
+            "Attempt to use a reserved URI ant:notallowed");
     }
 
     public static class MyTask extends Task {