diff --git a/src/gui/kernel/qopenglcontext.cpp b/src/gui/kernel/qopenglcontext.cpp
index 29f46aefd6..4668f9e750 100644
--- a/src/gui/kernel/qopenglcontext.cpp
+++ b/src/gui/kernel/qopenglcontext.cpp
@@ -541,9 +541,9 @@ void QOpenGLContext::swapBuffers(QSurface *surface)
 
     Returns 0 if no such function can be found.
 */
-QFunctionPointer QOpenGLContext::getProcAddress(const QByteArray &procName)
+QFunctionPointer QOpenGLContext::getProcAddress(const QByteArray &procName) const
 {
-    Q_D(QOpenGLContext);
+    Q_D(const QOpenGLContext);
     if (!d->platformGLContext)
         return 0;
     return d->platformGLContext->getProcAddress(procName);
diff --git a/src/gui/kernel/qopenglcontext.h b/src/gui/kernel/qopenglcontext.h
index 5e1cd17635..efb65ae3e7 100644
--- a/src/gui/kernel/qopenglcontext.h
+++ b/src/gui/kernel/qopenglcontext.h
@@ -115,7 +115,7 @@ public:
     void doneCurrent();
 
     void swapBuffers(QSurface *surface);
-    QFunctionPointer getProcAddress(const QByteArray &procName);
+    QFunctionPointer getProcAddress(const QByteArray &procName) const;
 
     QSurface *surface() const;