diff --git a/src/Magnum/Platform/GlfwApplication.h b/src/Magnum/Platform/GlfwApplication.h
index 20dc06b0f..ce6723642 100644
--- a/src/Magnum/Platform/GlfwApplication.h
+++ b/src/Magnum/Platform/GlfwApplication.h
@@ -480,7 +480,7 @@ class GlfwApplication {
 
         static GlfwApplication* _instance;
 
-        GLFWwindow* _window;
+        GLFWwindow* _window{ nullptr };
         Flags _flags;
         #ifdef MAGNUM_TARGET_GL
         std::unique_ptr<Platform::GLContext> _context;