diff --git a/build/org.eclipse.cdt.managedbuilder.ui/plugin.xml b/build/org.eclipse.cdt.managedbuilder.ui/plugin.xml
index 91eed1b7b46..e5358f05bab 100644
--- a/build/org.eclipse.cdt.managedbuilder.ui/plugin.xml
+++ b/build/org.eclipse.cdt.managedbuilder.ui/plugin.xml
@@ -181,7 +181,16 @@
            menuGroupId="org.eclipse.cdt.ui.newProject"
            type="new"
            wizardId="org.eclipse.cdt.ui.wizards.ConvertToMakeWizard">
-         <enablement/>
+		 <enablement>
+			<and>
+	            <adapt type="org.eclipse.core.resources.IProject"/>
+	            <not>
+	               <test
+	                     property="org.eclipse.core.resources.projectNature"
+	                     value="org.eclipse.cdt.core.cnature"/>
+	            </not>
+			</and>
+         </enablement>
       </commonWizard>
   </extension>
   <extension
diff --git a/core/org.eclipse.cdt.ui/plugin.xml b/core/org.eclipse.cdt.ui/plugin.xml
index 8a4f9375b04..250875d659f 100644
--- a/core/org.eclipse.cdt.ui/plugin.xml
+++ b/core/org.eclipse.cdt.ui/plugin.xml
@@ -2013,32 +2013,14 @@
 	         menuGroupId="org.eclipse.cdt.ui.newProject"
 	         type="new"
 	         wizardId="org.eclipse.cdt.ui.wizards.NewCWizard1">
-		 <enablement>
-			<or>
-				<instanceof value="org.eclipse.cdt.core.model.ICElement" />	
-	            <adapt type="org.eclipse.core.resources.IProject">
-	               <test
-	                     property="org.eclipse.core.resources.projectNature"
-	                     value="org.eclipse.cdt.core.cnature"/>
-	            </adapt>
-			</or>
-         </enablement>
+		 <enablement/>
 	   </commonWizard>
 	   <commonWizard
 	         associatedExtensionId="org.eclipse.cdt.ui.navigator.content"
 	         menuGroupId="org.eclipse.cdt.ui.newProject"
 	         type="new"
 	         wizardId="org.eclipse.cdt.ui.wizards.NewCWizard2">
-		 <enablement>
-			<or>
-				<instanceof value="org.eclipse.cdt.core.model.ICElement" />	
-	            <adapt type="org.eclipse.core.resources.IProject">
-	               <test
-	                     property="org.eclipse.core.resources.projectNature"
-	                     value="org.eclipse.cdt.core.cnature"/>
-	            </adapt>
-			</or>
-         </enablement>
+		 <enablement/>
 	   </commonWizard>
 	   <commonWizard
 	         associatedExtensionId="org.eclipse.cdt.ui.navigator.content"