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-rw-r--r--src/plugins/platforms/windows/qwindowsglcontext.cpp3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/plugins/platforms/windows/qwindowsglcontext.cpp b/src/plugins/platforms/windows/qwindowsglcontext.cpp
index 2528ad949f..cabc5974eb 100644
--- a/src/plugins/platforms/windows/qwindowsglcontext.cpp
+++ b/src/plugins/platforms/windows/qwindowsglcontext.cpp
@@ -1042,6 +1042,9 @@ bool QWindowsGLContext::makeCurrent(QPlatformSurface *surface)
if (QWindowsContext::verboseGL > 1)
qDebug("%s context=%p contexts=%d", __FUNCTION__, this, m_windowContexts.size());
#endif // DEBUG_GL
+
+ Q_ASSERT(surface->surface()->surfaceType() == QSurface::OpenGLSurface);
+
// Do we already have a DC entry for that window?
QWindowsWindow *window = static_cast<QWindowsWindow *>(surface);
const HWND hwnd = window->handle();