diff --git a/src/plugins/help/helpplugin.cpp b/src/plugins/help/helpplugin.cpp
index 4119fa8f90bf627306c4c4f0ef22976c8bfaf86d..3f9418245eca05c2f761b7c71de25295810f4db3 100644
--- a/src/plugins/help/helpplugin.cpp
+++ b/src/plugins/help/helpplugin.cpp
@@ -430,6 +430,8 @@ bool HelpPlugin::updateDocumentation()
                     qWarning() << "Error unregistering namespace '"
                         << nameSpace << "' from file '" << file << "': "
                         << hc.error();
+                } else {
+                    needsSetup = true;
                 }
             }