--- ./src/java/org/apache/ivy/ant/IvyBuildNumber.java	2012-04-02 23:10:58.000000000 +0200
+++ ./src/java/org/apache/ivy/ant/IvyBuildNumber.java.fixed	2012-04-24 10:25:45.000000000 +0200
@@ -147,7 +147,7 @@
         Ivy ivy = getIvyInstance();
         IvySettings settings = ivy.getSettings();
         if (branch == null) {
-            settings.getDefaultBranch(new ModuleId(organisation, module));
+            branch = settings.getDefaultBranch(new ModuleId(organisation, module));
         }
         if (revision == null || revision.length() == 0) {
             revision = "latest.integration";