diff --git a/desktop/kde/applications/cantor/pspec.xml b/desktop/kde/applications/cantor/pspec.xml
index fdb102592b..914831d441 100755
--- a/desktop/kde/applications/cantor/pspec.xml
+++ b/desktop/kde/applications/cantor/pspec.xml
@@ -18,6 +18,7 @@
         <BuildDependencies>
             <Dependency>extra-cmake-modules</Dependency>
             <Dependency versionFrom="5.7.1">qt5-base-devel</Dependency>
+            <Dependency versionFrom="5.7.1">qt5-assistant-devel</Dependency>
             <Dependency versionFrom="13.0.4">mesa-devel</Dependency>
             <Dependency versionFrom="5.7.1">qt5-svg-devel</Dependency>
             <Dependency versionFrom="5.7.1">qt5-xmlpatterns-devel</Dependency>