diff --git a/project.ant/manifest.mf b/project.ant/manifest.mf
--- a/project.ant/manifest.mf
+++ b/project.ant/manifest.mf
@@ -1,5 +1,5 @@
 Manifest-Version: 1.0
 OpenIDE-Module: org.netbeans.modules.project.ant/1
-OpenIDE-Module-Specification-Version: 1.63
+OpenIDE-Module-Specification-Version: 1.64
 OpenIDE-Module-Layer: org/netbeans/modules/project/ant/resources/mf-layer.xml
 OpenIDE-Module-Localizing-Bundle: org/netbeans/modules/project/ant/Bundle.properties
diff --git a/project.ant/nbproject/project.xml b/project.ant/nbproject/project.xml
--- a/project.ant/nbproject/project.xml
+++ b/project.ant/nbproject/project.xml
@@ -90,7 +90,7 @@
                     <compile-dependency/>
                     <run-dependency>
                         <release-version>1</release-version>
-                        <specification-version>1.78</specification-version>
+                        <specification-version>1.80</specification-version>
                     </run-dependency>
                 </dependency>
                 <dependency>
@@ -128,14 +128,6 @@
                     </run-dependency>
                 </dependency>
                 <dependency>
-                    <code-name-base>org.openide.util.ui</code-name-base>
-                    <build-prerequisite/>
-                    <compile-dependency/>
-                    <run-dependency>
-                        <specification-version>9.3</specification-version>
-                    </run-dependency>
-                </dependency>
-                <dependency>
                     <code-name-base>org.openide.util</code-name-base>
                     <build-prerequisite/>
                     <compile-dependency/>
@@ -151,6 +143,14 @@
                         <specification-version>8.0</specification-version>
                     </run-dependency>
                 </dependency>
+                <dependency>
+                    <code-name-base>org.openide.util.ui</code-name-base>
+                    <build-prerequisite/>
+                    <compile-dependency/>
+                    <run-dependency>
+                        <specification-version>9.3</specification-version>
+                    </run-dependency>
+                </dependency>
             </module-dependencies>
             <test-dependencies>
                 <test-type>
diff --git a/project.ant/src/org/netbeans/spi/project/support/ant/ProjectGenerator.java b/project.ant/src/org/netbeans/spi/project/support/ant/ProjectGenerator.java
--- a/project.ant/src/org/netbeans/spi/project/support/ant/ProjectGenerator.java
+++ b/project.ant/src/org/netbeans/spi/project/support/ant/ProjectGenerator.java
@@ -57,6 +57,7 @@
 import org.netbeans.api.project.ProjectManager;
 import org.netbeans.modules.project.ant.AntBasedProjectFactorySingleton;
 import org.netbeans.modules.project.ant.ProjectLibraryProvider;
+import org.netbeans.spi.project.ui.support.ProjectConvertors;
 import org.openide.filesystems.FileObject;
 import org.openide.filesystems.FileUtil;
 import org.openide.util.Lookup;
@@ -135,7 +136,8 @@
                             prj = ProjectManager.getDefault().findProject(directory);
                         }
                     }
-                    if (prj != null) {
+                    if (prj != null
+                            && !ProjectConvertors.isConvertorProject(prj)) {
                         throw new IllegalArgumentException("Already a " + prj.getClass().getName() + " in " + directory); // NOI18N
                     }
                     projectXml = FileUtil.createData(directory, AntProjectHelper.PROJECT_XML_PATH);