diff --git a/src/main/org/apache/tools/ant/types/defaults.properties b/src/main/org/apache/tools/ant/types/defaults.properties
index aaadef694..eab5c9a8d 100644
--- a/src/main/org/apache/tools/ant/types/defaults.properties
+++ b/src/main/org/apache/tools/ant/types/defaults.properties
@@ -6,4 +6,5 @@ mapper=org.apache.tools.ant.types.Mapper
 filterset=org.apache.tools.ant.types.FilterSet
 description=org.apache.tools.ant.types.Description
 classfileset=org.apache.tools.ant.types.optional.depend.ClassfileSet
-
+substitution=org.apache.tools.ant.types.Substitution
+regularexpression=org.apache.tools.ant.types.RegularExpression