diff --git a/src/main/org/apache/tools/ant/types/defaults.properties b/src/main/org/apache/tools/ant/types/defaults.properties
index 979474527..48bec7ed1 100644
--- a/src/main/org/apache/tools/ant/types/defaults.properties
+++ b/src/main/org/apache/tools/ant/types/defaults.properties
@@ -20,3 +20,4 @@ zipfileset=org.apache.tools.ant.types.ZipFileSet
 scriptfilter=org.apache.tools.ant.types.optional.ScriptFilter
 propertyset=org.apache.tools.ant.types.PropertySet
 assertions=org.apache.tools.ant.types.Assertions
+concatfilter=org.apache.tools.ant.filters.ConcatFilter