diff --git a/src/main/org/apache/tools/ant/taskdefs/Definer.java b/src/main/org/apache/tools/ant/taskdefs/Definer.java
index 70603167a..df5217e46 100644
--- a/src/main/org/apache/tools/ant/taskdefs/Definer.java
+++ b/src/main/org/apache/tools/ant/taskdefs/Definer.java
@@ -421,7 +421,7 @@ public abstract class Definer extends DefBase {
             Antlib antlib = Antlib.createAntlib(getProject(), url, getURI());
             antlib.setClassLoader(classLoader);
             antlib.setURI(getURI());
-            antlib.perform();
+            antlib.execute();
         } catch (BuildException ex) {
             throw ProjectHelper.addLocationToBuildException(
                 ex, getLocation());