diff --git a/maven-archetype-plugin/src/main/java/org/apache/maven/archetype/ui/generation/DefaultArchetypeGenerationConfigurator.java b/maven-archetype-plugin/src/main/java/org/apache/maven/archetype/ui/generation/DefaultArchetypeGenerationConfigurator.java
index 186700b5..4e1caf07 100644
--- a/maven-archetype-plugin/src/main/java/org/apache/maven/archetype/ui/generation/DefaultArchetypeGenerationConfigurator.java
+++ b/maven-archetype-plugin/src/main/java/org/apache/maven/archetype/ui/generation/DefaultArchetypeGenerationConfigurator.java
@@ -53,6 +53,7 @@
 import org.apache.velocity.runtime.RuntimeServices;
 import org.apache.velocity.runtime.RuntimeSingleton;
 import org.apache.velocity.runtime.parser.ParseException;
+import org.apache.velocity.runtime.parser.node.ASTNegateNode;
 import org.apache.velocity.runtime.parser.node.ASTReference;
 import org.apache.velocity.runtime.parser.node.SimpleNode;
 import org.apache.velocity.runtime.visitor.BaseVisitor;
@@ -346,6 +347,11 @@ public Object visit(ASTReference node, Object data) {
                                         referencedPropertyNames.add(node.getRootString());
                                         return super.visit(node, data);
                                     }
+
+                                    @Override
+                                    public Object visit(ASTNegateNode astNegateNode, Object data) {
+                                        return astNegateNode.childrenAccept(this, data);
+                                    }
                                 },
                                 velocityRuntime);
                     } catch (ParseException e) {
diff --git a/pom.xml b/pom.xml
index daf95e7a..2141d72d 100644
--- a/pom.xml
+++ b/pom.xml
@@ -179,7 +179,7 @@
       <dependency>
         <groupId>org.apache.velocity</groupId>
         <artifactId>velocity-engine-core</artifactId>
-        <version>2.3</version>
+        <version>2.4</version>
       </dependency>
       <dependency>
         <groupId>commons-collections</groupId>