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-rw-r--r--src/opengl/qwindowsurface_gl.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/opengl/qwindowsurface_gl.cpp b/src/opengl/qwindowsurface_gl.cpp
index e4c38fa..d92241d 100644
--- a/src/opengl/qwindowsurface_gl.cpp
+++ b/src/opengl/qwindowsurface_gl.cpp
@@ -90,7 +90,7 @@ QT_BEGIN_NAMESPACE
// QGLGraphicsSystem
//
#ifdef Q_WS_WIN
-Q_GUI_EXPORT bool qt_win_owndc_required;
+extern Q_GUI_EXPORT bool qt_win_owndc_required;
#endif
QGLGraphicsSystem::QGLGraphicsSystem()
: QGraphicsSystem()