diff --git a/src/gui/game/GameController.cpp b/src/gui/game/GameController.cpp
index a420288d6..15f1adb35 100644
--- a/src/gui/game/GameController.cpp
+++ b/src/gui/game/GameController.cpp
@@ -379,17 +379,7 @@ ui::Point GameController::PointTranslate(ui::Point point)
 	if(point.X < 0)
 		point.X = 0;
 
-	bool zoomEnabled = gameModel->GetZoomEnabled();
-	if(!zoomEnabled)
-		return point;
-	//If we try to draw inside the zoom window, normalise the coordinates
-	int zoomFactor = gameModel->GetZoomFactor();
-	ui::Point zoomWindowPosition = gameModel->GetZoomWindowPosition();
-	ui::Point zoomWindowSize = ui::Point(gameModel->GetZoomSize()*zoomFactor, gameModel->GetZoomSize()*zoomFactor);
-
-	if(point.X >= zoomWindowPosition.X && point.X >= zoomWindowPosition.Y && point.X <= zoomWindowPosition.X+zoomWindowSize.X && point.Y <= zoomWindowPosition.Y+zoomWindowSize.Y)
-		return ((point-zoomWindowPosition)/gameModel->GetZoomFactor())+gameModel->GetZoomPosition();
-	return point;
+	return gameModel->AdjustZoomCoords(point);
 }
 
 ui::Point GameController::NormaliseBlockCoord(ui::Point point)
diff --git a/src/gui/game/GameModel.cpp b/src/gui/game/GameModel.cpp
index 8e5b0a325..19bebdcdc 100644
--- a/src/gui/game/GameModel.cpp
+++ b/src/gui/game/GameModel.cpp
@@ -326,7 +326,7 @@ void GameModel::BuildMenus()
 	//Add special sign and prop tools
 	menuList[SC_TOOL]->AddTool(new WindTool(0, "WIND", "Creates air movement.", 64, 64, 64, "DEFAULT_UI_WIND"));
 	menuList[SC_TOOL]->AddTool(new PropertyTool());
-	menuList[SC_TOOL]->AddTool(new SignTool());
+	menuList[SC_TOOL]->AddTool(new SignTool(this));
 	menuList[SC_TOOL]->AddTool(new SampleTool(this));
 
 	//Add decoration tools to menu
@@ -694,6 +694,20 @@ ui::Point GameModel::GetZoomPosition()
 	return ren->zoomScopePosition;
 }
 
+ui::Point GameModel::AdjustZoomCoords(ui::Point position)
+{
+	if (!GetZoomEnabled())
+		return position;
+
+	int zoomFactor = GetZoomFactor();
+	ui::Point zoomWindowPosition = GetZoomWindowPosition();
+	ui::Point zoomWindowSize = ui::Point(GetZoomSize()*zoomFactor, GetZoomSize()*zoomFactor);
+
+	if (position.X >= zoomWindowPosition.X && position.X >= zoomWindowPosition.Y && position.X <= zoomWindowPosition.X+zoomWindowSize.X && position.Y <= zoomWindowPosition.Y+zoomWindowSize.Y)
+		return ((position-zoomWindowPosition)/GetZoomFactor())+GetZoomPosition();
+	return position;
+}
+
 void GameModel::SetZoomWindowPosition(ui::Point position)
 {
 	ren->zoomWindowPosition = position;
diff --git a/src/gui/game/GameModel.h b/src/gui/game/GameModel.h
index f77fe2672..8bdf1d1f9 100644
--- a/src/gui/game/GameModel.h
+++ b/src/gui/game/GameModel.h
@@ -182,6 +182,7 @@ public:
 	int GetZoomFactor();
 	void SetZoomPosition(ui::Point position);
 	ui::Point GetZoomPosition();
+	ui::Point AdjustZoomCoords(ui::Point position);
 	void SetZoomWindowPosition(ui::Point position);
 	ui::Point GetZoomWindowPosition();
 	void SetStamp(GameSave * newStamp);
diff --git a/src/gui/game/SignTool.cpp b/src/gui/game/SignTool.cpp
index fdc1fb5c0..133b2d95c 100644
--- a/src/gui/game/SignTool.cpp
+++ b/src/gui/game/SignTool.cpp
@@ -7,6 +7,7 @@
 #include "gui/interface/Label.h"
 #include "gui/interface/Textbox.h"
 #include "gui/interface/DropDown.h"
+#include "gui/game/GameModel.h"
 
 class SignWindow: public ui::Window
 {
@@ -222,12 +223,13 @@ void SignWindow::DoMouseMove(int x, int y, int dx, int dy) {
 		ui::Window::DoMouseMove(x, y, dx, dy);
 	else
 	{
-		if(x < XRES && y < YRES)
+		ui::Point pos = tool->gameModel->AdjustZoomCoords(ui::Point(x, y));
+		if(pos.X < XRES && pos.Y < YRES)
 		{
-			movingSign->x = x;
-			movingSign->y = y;
-			signPosition.X = x;
-			signPosition.Y = y;
+			movingSign->x = pos.X;
+			movingSign->y = pos.Y;
+			signPosition.X = pos.X;
+			signPosition.Y = pos.Y;
 		}
 	}
 }
diff --git a/src/gui/game/Tool.h b/src/gui/game/Tool.h
index 641611ffe..76988da19 100644
--- a/src/gui/game/Tool.h
+++ b/src/gui/game/Tool.h
@@ -42,11 +42,15 @@ public:
 	int colRed, colBlue, colGreen;
 };
 
+class GameModel;
+
 class SignTool: public Tool
 {
 public:
-	SignTool():
-	Tool(0, "SIGN", "Sign. Displays text. Click on a sign to edit it or anywhere else to place a new one.", 0, 0, 0, "DEFAULT_UI_SIGN", SignTool::GetIcon)
+	GameModel * gameModel;
+	SignTool(GameModel *model):
+	Tool(0, "SIGN", "Sign. Displays text. Click on a sign to edit it or anywhere else to place a new one.", 0, 0, 0, "DEFAULT_UI_SIGN", SignTool::GetIcon),
+	  gameModel(model)
 	{
 	}
 	static VideoBuffer * GetIcon(int toolID, int width, int height);
@@ -58,8 +62,6 @@ public:
 	virtual void DrawFill(Simulation * sim, Brush * brush, ui::Point position) { }
 };
 
-class GameModel;
-
 class SampleTool: public Tool
 {
 	GameModel * gameModel;