diff --git a/src/main/org/apache/tools/ant/types/FileSet.java b/src/main/org/apache/tools/ant/types/FileSet.java
index a5f09e464..5b7c078b1 100644
--- a/src/main/org/apache/tools/ant/types/FileSet.java
+++ b/src/main/org/apache/tools/ant/types/FileSet.java
@@ -180,8 +180,8 @@ public class FileSet extends DataType implements Cloneable {
     }
     
     /**
-     * Sets the set of include patterns. Patterns may be separated by a comma
-     * or a space.
+     * Appends <code>includes</code> to the current list of include patterns. 
+     * Patterns may be separated by a comma or a space.
      *
      * @param includes the string containing the include patterns
      */
@@ -194,8 +194,8 @@ public class FileSet extends DataType implements Cloneable {
     }
 
     /**
-     * Sets the set of exclude patterns. Patterns may be separated by a comma
-     * or a space.
+     * Appends <code>excludes</code> to the current list of exclude patterns. 
+     * Patterns may be separated by a comma or a space.
      *
      * @param excludes the string containing the exclude patterns
      */
diff --git a/src/main/org/apache/tools/ant/types/PatternSet.java b/src/main/org/apache/tools/ant/types/PatternSet.java
index 848f562a4..2dae3aae2 100644
--- a/src/main/org/apache/tools/ant/types/PatternSet.java
+++ b/src/main/org/apache/tools/ant/types/PatternSet.java
@@ -205,8 +205,8 @@ public class PatternSet extends DataType {
     }
 
     /**
-     * Sets the set of include patterns. Patterns may be separated by a comma
-     * or a space.
+     * Appends <code>includes</code> to the current list of include patterns. 
+     * Patterns may be separated by a comma or a space.
      *
      * @param includes the string containing the include patterns
      */
@@ -223,8 +223,8 @@ public class PatternSet extends DataType {
     }
 
     /**
-     * Sets the set of exclude patterns. Patterns may be separated by a comma
-     * or a space.
+     * Appends <code>excludes</code> to the current list of exclude patterns. 
+     * Patterns may be separated by a comma or a space.
      *
      * @param excludes the string containing the exclude patterns
      */