diff --git a/interfaces/idocumentationcontroller.h b/interfaces/idocumentationcontroller.h
--- a/interfaces/idocumentationcontroller.h
+++ b/interfaces/idocumentationcontroller.h
@@ -45,10 +45,10 @@
     /** Return the corresponding documentation instance for a determinate declaration. */
     virtual IDocumentation::Ptr documentationForDeclaration(Declaration* declaration) = 0;
 
+public Q_SLOTS:
     /** Show the documentation specified by @p doc. */
     virtual void showDocumentation(const IDocumentation::Ptr& doc) = 0;
 
-public Q_SLOTS:
     /** Emit signal when the documentation providers list changed. */
     virtual void changedDocumentationProviders() = 0;
 
diff --git a/language/duchain/navigation/abstractnavigationcontext.cpp b/language/duchain/navigation/abstractnavigationcontext.cpp
--- a/language/duchain/navigation/abstractnavigationcontext.cpp
+++ b/language/duchain/navigation/abstractnavigationcontext.cpp
@@ -213,7 +213,10 @@
       }
     case NavigationAction::ShowDocumentation: {
         auto doc = ICore::self()->documentationController()->documentationForDeclaration(action.decl.data());
-        ICore::self()->documentationController()->showDocumentation(doc);
+        // This is used to execute the slot delayed in the event-loop, so crashes are avoided
+        // which can happen e.g. due to focus change events resulting in tooltip destruction and thus this object
+        qRegisterMetaType<IDocumentation::Ptr>("IDocumentation::Ptr");
+        QMetaObject::invokeMethod(ICore::self()->documentationController(), "showDocumentation", Qt::QueuedConnection, Q_ARG(IDocumentation::Ptr, doc));
       }
       break;
   }