diff --git a/src/plugins/cmakeprojectmanager/CMakeProjectManager.pluginspec.in b/src/plugins/cmakeprojectmanager/CMakeProjectManager.pluginspec.in
index 610d1a0ca9e..13d8edd4081 100644
--- a/src/plugins/cmakeprojectmanager/CMakeProjectManager.pluginspec.in
+++ b/src/plugins/cmakeprojectmanager/CMakeProjectManager.pluginspec.in
@@ -17,5 +17,6 @@ Alternatively, this plugin may be used under the terms of the GNU Lesser General
         <dependency name=\"TextEditor\" version=\"$$QTCREATOR_VERSION\"/>
         <dependency name=\"ProjectExplorer\" version=\"$$QTCREATOR_VERSION\"/>
         <dependency name=\"CppTools\" version=\"$$QTCREATOR_VERSION\"/>
+        <dependency name=\"Designer\" version=\"$$QTCREATOR_VERSION\" type=\"optional\"/>
     </dependencyList>
 </plugin>
diff --git a/src/plugins/qt4projectmanager/Qt4ProjectManager.pluginspec.in b/src/plugins/qt4projectmanager/Qt4ProjectManager.pluginspec.in
index 1f2267e6fc8..93b604dc747 100644
--- a/src/plugins/qt4projectmanager/Qt4ProjectManager.pluginspec.in
+++ b/src/plugins/qt4projectmanager/Qt4ProjectManager.pluginspec.in
@@ -18,5 +18,6 @@ Alternatively, this plugin may be used under the terms of the GNU Lesser General
         <dependency name=\"ProjectExplorer\" version=\"$$QTCREATOR_VERSION\"/>
         <dependency name=\"CppTools\" version=\"$$QTCREATOR_VERSION\"/>
         <dependency name=\"Debugger\" version=\"$$QTCREATOR_VERSION\"/>
+        <dependency name=\"Designer\" version=\"$$QTCREATOR_VERSION\" type=\"optional\"/>
     </dependencyList>
 </plugin>