diff --git a/desktop/kde/sdk/umbrello/pspec.xml b/desktop/kde/sdk/umbrello/pspec.xml
index 0fe46f843d..4bc01857a3 100644
--- a/desktop/kde/sdk/umbrello/pspec.xml
+++ b/desktop/kde/sdk/umbrello/pspec.xml
@@ -29,6 +29,7 @@
             <Dependency>kdoctools-devel</Dependency>
             <Dependency>docbook-xsl</Dependency>
             <Dependency>extra-cmake-modules</Dependency>
+            <Dependency>kwindowsystem-devel</Dependency>
         </BuildDependencies>
         <!--Patches>
             <Patch>upstream.patch</Patch>
@@ -55,7 +56,8 @@
             <Dependency>kconfigwidgets</Dependency>
             <Dependency>kwidgetsaddons</Dependency>
             <Dependency>ktexteditor</Dependency>
-            <Dependency>libxslt</Dependency>            
+            <Dependency>libxslt</Dependency>   
+            <Dependency>kwindowsystem</Dependency>
         </RuntimeDependencies>        
         <Files>
             <Path fileType="data">/usr/share</Path>