diff --git a/src/python/magnum/platform/egl.cpp b/src/python/magnum/platform/egl.cpp
index 56910e3..6d4a3c6 100644
--- a/src/python/magnum/platform/egl.cpp
+++ b/src/python/magnum/platform/egl.cpp
@@ -58,6 +58,10 @@ void egl(py::module& m) {
             #pragma GCC diagnostic pop
             #endif
         }
+
+        /* The base doesn't have a virtual destructor because in C++ it's never
+           deleted through a pointer to the base. Here we need it, though. */
+        virtual ~PyWindowlessApplication() {}
     };
 
     py::class_<PyWindowlessApplication> windowlessEglApplication{m, "WindowlessApplication", "Windowless EGL application"};
diff --git a/src/python/magnum/platform/glfw.cpp b/src/python/magnum/platform/glfw.cpp
index 2dabd50..2003f74 100644
--- a/src/python/magnum/platform/glfw.cpp
+++ b/src/python/magnum/platform/glfw.cpp
@@ -45,6 +45,10 @@ void glfw(py::module& m) {
         void mousePressEvent(MouseEvent&) override {}
         void mouseReleaseEvent(MouseEvent&) override {}
         void mouseMoveEvent(MouseMoveEvent&) override {}
+
+        /* The base doesn't have a virtual destructor because in C++ it's never
+           deleted through a pointer to the base. Here we need it, though. */
+        virtual ~PublicizedApplication() {}
     };
 
     struct PyApplication: PublicizedApplication {
diff --git a/src/python/magnum/platform/glx.cpp b/src/python/magnum/platform/glx.cpp
index 6307acc..6ae0b74 100644
--- a/src/python/magnum/platform/glx.cpp
+++ b/src/python/magnum/platform/glx.cpp
@@ -58,6 +58,10 @@ void glx(py::module& m) {
             #pragma GCC diagnostic pop
             #endif
         }
+
+        /* The base doesn't have a virtual destructor because in C++ it's never
+           deleted through a pointer to the base. Here we need it, though. */
+        virtual ~PyWindowlessApplication() {}
     };
 
     py::class_<PyWindowlessApplication> windowlessGlxApplication{m, "WindowlessApplication", "Windowless GLX application"};
diff --git a/src/python/magnum/platform/sdl2.cpp b/src/python/magnum/platform/sdl2.cpp
index 4ec817f..2d3be7c 100644
--- a/src/python/magnum/platform/sdl2.cpp
+++ b/src/python/magnum/platform/sdl2.cpp
@@ -45,6 +45,10 @@ void sdl2(py::module& m) {
         void mousePressEvent(MouseEvent&) override {}
         void mouseReleaseEvent(MouseEvent&) override {}
         void mouseMoveEvent(MouseMoveEvent&) override {}
+
+        /* The base doesn't have a virtual destructor because in C++ it's never
+           deleted through a pointer to the base. Here we need it, though. */
+        virtual ~PublicizedApplication() {}
     };
 
     struct PyApplication: PublicizedApplication {