diff --git a/modules/juce_opengl/opengl/juce_OpenGLContext.cpp b/modules/juce_opengl/opengl/juce_OpenGLContext.cpp
index ba961fce44..e41a6b471f 100644
--- a/modules/juce_opengl/opengl/juce_OpenGLContext.cpp
+++ b/modules/juce_opengl/opengl/juce_OpenGLContext.cpp
@@ -293,8 +293,8 @@ public:
             {
                 scale = newScale;
                 viewportArea = newArea;
-                transform = AffineTransform::scale ((float) newArea.getRight()  / (float) localBounds.getRight(),
-                                                    (float) newArea.getBottom() / (float) localBounds.getBottom());
+                transform = AffineTransform::scale ((float) newArea.getWidth()  / (float) localBounds.getWidth(),
+                                                    (float) newArea.getHeight() / (float) localBounds.getHeight());
 
                 if (canTriggerUpdate)
                     invalidateAll();