diff --git a/desktop/toolkit/gtk/gtksourceview3/pspec.xml b/desktop/toolkit/gtk/gtksourceview3/pspec.xml
index 7ab821e775..060d4c5706 100755
--- a/desktop/toolkit/gtk/gtksourceview3/pspec.xml
+++ b/desktop/toolkit/gtk/gtksourceview3/pspec.xml
@@ -15,6 +15,7 @@
         <Archive sha1sum="1883e5c244791e3b66fd70c71f3f82221c221c29" type="tarxz">mirrors://gnome/gtksourceview/3.24/gtksourceview-3.24.11.tar.xz</Archive>
         <BuildDependencies>
             <Dependency>python3</Dependency>
+            <Dependency>python-six</Dependency>
             <Dependency>itstool</Dependency>
             <Dependency>valgrind</Dependency>
             <Dependency>intltool</Dependency>