diff --git a/rts/System/SpringApp.cpp b/rts/System/SpringApp.cpp
index eac5260..9c849ee 100644
--- a/rts/System/SpringApp.cpp
+++ b/rts/System/SpringApp.cpp
@@ -519,7 +519,11 @@ void SpringApp::SetupViewportGeometry()
 		}
 	}
 
-	agui::gui->UpdateScreenGeometry(gu->viewSizeX, gu->viewSizeY);
+	agui::gui->UpdateScreenGeometry(
+			gu->viewSizeX, 
+			gu->viewSizeY, 
+			gu->viewPosX, 
+			(gu->winSizeY - gu->viewSizeY - gu->viewPosY) );
 	gu->pixelX = 1.0f / (float)gu->viewSizeX;
 	gu->pixelY = 1.0f / (float)gu->viewSizeY;
 
diff --git a/rts/aGui/Gui.cpp b/rts/aGui/Gui.cpp
index 927d5ab..beb1fec 100644
--- a/rts/aGui/Gui.cpp
+++ b/rts/aGui/Gui.cpp
@@ -84,9 +84,9 @@ void Gui::RmElement(GuiElement* elem)
 	}
 }
 
-void Gui::UpdateScreenGeometry(int screenx, int screeny)
+void Gui::UpdateScreenGeometry(int screenx, int screeny, int screenOffsetX, int screenOffsetY)
 {
-	GuiElement::UpdateDisplayGeo(screenx, screeny);
+	GuiElement::UpdateDisplayGeo(screenx, screeny, screenOffsetX, screenOffsetY);
 }
 
 bool Gui::MouseOverElement(const GuiElement* elem, int x, int y) const
diff --git a/rts/aGui/Gui.h b/rts/aGui/Gui.h
index 95e74bd..4e62c68 100644
--- a/rts/aGui/Gui.h
+++ b/rts/aGui/Gui.h
@@ -21,7 +21,7 @@ public:
 	/// deletes the element on the next draw
 	void RmElement(GuiElement*);
 	
-	void UpdateScreenGeometry(int screenx, int screeny);
+	void UpdateScreenGeometry(int screenx, int screeny, int screenOffsetX, int screenOffsetY);
 
 	bool MouseOverElement(const GuiElement*, int x, int y) const;
 
@@ -46,4 +46,4 @@ void InitGui();
 
 }
 
-#endif
\ No newline at end of file
+#endif
diff --git a/rts/aGui/GuiElement.cpp b/rts/aGui/GuiElement.cpp
index a083f56..f9a12ab 100644
--- a/rts/aGui/GuiElement.cpp
+++ b/rts/aGui/GuiElement.cpp
@@ -6,6 +6,7 @@ namespace agui
 {
 
 int GuiElement::screensize[2];
+int GuiElement::screenoffset[2];
 
 GuiElement::GuiElement(GuiElement* _parent) : parent(_parent), fixedSize(false)
 {
@@ -53,20 +54,22 @@ bool GuiElement::MouseOver(float x, float y) const
 	return (x >= pos[0] && x <= pos[0]+size[0]) && (y >= pos[1] && y <= pos[1]+size[1]);
 }
 
-void GuiElement::UpdateDisplayGeo(int x, int y)
+void GuiElement::UpdateDisplayGeo(int x, int y, int xOffset, int yOffset)
 {
 	screensize[0] = x;
 	screensize[1] = y;
+	screenoffset[0] = xOffset;
+	screenoffset[1] = yOffset;
 }
 
 float GuiElement::PixelToGlX(int x)
 {
-	return float(x)/float(screensize[0]);
+	return float(x - screenoffset[0])/float(screensize[0]);
 }
 
 float GuiElement::PixelToGlY(int y)
 {
-	return 1.0f - float(y)/float(screensize[1]);
+	return 1.0f - float(y - screenoffset[1])/float(screensize[1]);
 }
 
 void GuiElement::AddChild(GuiElement* elem)
diff --git a/rts/aGui/GuiElement.h b/rts/aGui/GuiElement.h
index 272ff26..aa121b8 100644
--- a/rts/aGui/GuiElement.h
+++ b/rts/aGui/GuiElement.h
@@ -18,7 +18,7 @@ public:
 	bool MouseOver(int x, int y) const;
 	bool MouseOver(float x, float y) const;
 	
-	static void UpdateDisplayGeo(int x, int y);
+	static void UpdateDisplayGeo(int x, int y, int offsetX, int offsetY);
 	static float PixelToGlX(int x);
 	static float PixelToGlY(int y);
 	
@@ -76,6 +76,7 @@ protected:
 	virtual void GeometryChangeSelf() {};
 	
 	static int screensize[2];
+	static int screenoffset[2];
 	
 	bool fixedSize;
 	float pos[2];
@@ -84,4 +85,4 @@ protected:
 
 }
 
-#endif
\ No newline at end of file
+#endif