diff --git a/src/Platform/GlutApplication.cpp b/src/Platform/GlutApplication.cpp
index ca9765030..38741a3fb 100644
--- a/src/Platform/GlutApplication.cpp
+++ b/src/Platform/GlutApplication.cpp
@@ -96,7 +96,7 @@ void GlutApplication::staticMouseMoveEvent(int x, int y) {
     instance->mouseMoveEvent(e);
 }
 
-GlutApplication::Configuration::Configuration(): _title("Magnum GLUT Application"), _size(800, 600) {}
+GlutApplication::Configuration::Configuration(): _title("Magnum GLUT Application"), _size(800, 600), _sampleCount(0) {}
 GlutApplication::Configuration::~Configuration() = default;
 
 }}
diff --git a/src/Platform/Sdl2Application.cpp b/src/Platform/Sdl2Application.cpp
index 164f4601e..d5f9a1850 100644
--- a/src/Platform/Sdl2Application.cpp
+++ b/src/Platform/Sdl2Application.cpp
@@ -167,7 +167,7 @@ void Sdl2Application::setMouseLocked(bool enabled) {
     SDL_SetRelativeMouseMode(enabled ? SDL_TRUE : SDL_FALSE);
 }
 
-Sdl2Application::Configuration::Configuration(): _title("Magnum SDL2 Application"), _size(800, 600) {}
+Sdl2Application::Configuration::Configuration(): _title("Magnum SDL2 Application"), _size(800, 600), _sampleCount(0) {}
 Sdl2Application::Configuration::~Configuration() = default;
 
 Sdl2Application::InputEvent::Modifiers Sdl2Application::MouseEvent::modifiers() {