diff --git a/src/plugins/help/helpplugin.cpp b/src/plugins/help/helpplugin.cpp
index 1efcf1f77f99a1961d5ded1be901b6e9727f67e2..ccdbaa5f9bae4b5e256ae1a222dd27774d8c2599 100644
--- a/src/plugins/help/helpplugin.cpp
+++ b/src/plugins/help/helpplugin.cpp
@@ -109,7 +109,7 @@ void HelpManager::registerDocumentation(const QStringList &fileNames)
                 if (hc.registeredDocumentations().contains(nameSpace)) {
                     if (!QFileInfo(hc.documentationFileName(nameSpace)).exists()) {
                         // remove stale documentation path first
-                        if (!hc.unregisterDocumentation(fileName)) {
+                        if (!hc.unregisterDocumentation(nameSpace)) {
                             qWarning() << "error unregistering " << fileName << hc.error();
                             continue;
                         }