diff --git a/BizHawk.Client.EmuHawk/tools/Lua/Libraries/EmuLuaLibrary.Forms.cs b/BizHawk.Client.EmuHawk/tools/Lua/Libraries/EmuLuaLibrary.Forms.cs
index 1148a56d54..16e6789fc9 100644
--- a/BizHawk.Client.EmuHawk/tools/Lua/Libraries/EmuLuaLibrary.Forms.cs
+++ b/BizHawk.Client.EmuHawk/tools/Lua/Libraries/EmuLuaLibrary.Forms.cs
@@ -1026,7 +1026,7 @@ namespace BizHawk.Client.EmuHawk
 		[LuaMethod(
 			"drawPolygon",
 			"Draws a polygon using the table of coordinates specified in points. This should be a table of tables(each of size 2). If x or y is passed, the polygon will be translated by the passed coordinate pair. Line is the color of the polygon. Background is the optional fill color")]
-		public void DrawPolygon(int componentHandle, LuaTable points, int x = 0, int y = 0, Color? line = null, Color? background = null)
+		public void DrawPolygon(int componentHandle, LuaTable points, int? x = null, int? y = null, Color? line = null, Color? background = null)
 		{
 			try
 			{
diff --git a/BizHawk.Client.EmuHawk/tools/Lua/Libraries/EmuLuaLibrary.Gui.cs b/BizHawk.Client.EmuHawk/tools/Lua/Libraries/EmuLuaLibrary.Gui.cs
index 6f328d2c75..adf906bf22 100644
--- a/BizHawk.Client.EmuHawk/tools/Lua/Libraries/EmuLuaLibrary.Gui.cs
+++ b/BizHawk.Client.EmuHawk/tools/Lua/Libraries/EmuLuaLibrary.Gui.cs
@@ -450,7 +450,7 @@ namespace BizHawk.Client.EmuHawk
 
 		[LuaMethodExample("gui.drawPolygon( { { 5, 10 }, { 10, 10 }, { 10, 20 }, { 5, 20 } }, 10, 30, 0x007F00FF, 0x7F7F7FFF );")]
 		[LuaMethod("drawPolygon", "Draws a polygon using the table of coordinates specified in points. This should be a table of tables(each of size 2). If x or y is passed, the polygon will be translated by the passed coordinate pair. Line is the color of the polygon. Background is the optional fill color")]
-		public void DrawPolygon(LuaTable points, int x = 0, int y = 0, Color? line = null, Color? background = null)
+		public void DrawPolygon(LuaTable points, int? x = null, int? y = null, Color? line = null, Color? background = null)
 		{
 			using (var g = GetGraphics())
 			{
@@ -460,7 +460,7 @@ namespace BizHawk.Client.EmuHawk
 					var i = 0;
 					foreach (LuaTable point in points.Values)
 					{
-						pointsArr[i] = new Point(LuaInt(point[1]) + x, LuaInt(point[2]) + y);
+						pointsArr[i] = new Point(LuaInt(point[1]) + x ?? 0, LuaInt(point[2]) + y ?? 0);
 						i++;
 					}
 
diff --git a/BizHawk.Client.EmuHawk/tools/Lua/LuaCanvas.cs b/BizHawk.Client.EmuHawk/tools/Lua/LuaCanvas.cs
index 2b0156cc84..6d98658c93 100644
--- a/BizHawk.Client.EmuHawk/tools/Lua/LuaCanvas.cs
+++ b/BizHawk.Client.EmuHawk/tools/Lua/LuaCanvas.cs
@@ -291,7 +291,7 @@ namespace BizHawk.Client.EmuHawk
 		[LuaMethod(
 			"drawPolygon",
 			"Draws a polygon using the table of coordinates specified in points. This should be a table of tables(each of size 2). Line is the color of the polygon. Background is the optional fill color")]
-		public void DrawPolygon(LuaTable points, int x = 0, int y = 0, Color? line = null, Color? background = null)
+		public void DrawPolygon(LuaTable points, int? x = null, int? y = null, Color? line = null, Color? background = null)
 		{
 			try
 			{
diff --git a/BizHawk.Client.EmuHawk/tools/Lua/LuaPictureBox.cs b/BizHawk.Client.EmuHawk/tools/Lua/LuaPictureBox.cs
index 4f2d33a780..5d10dd1481 100644
--- a/BizHawk.Client.EmuHawk/tools/Lua/LuaPictureBox.cs
+++ b/BizHawk.Client.EmuHawk/tools/Lua/LuaPictureBox.cs
@@ -255,13 +255,13 @@ namespace BizHawk.Client.EmuHawk
 			boxBackground.DrawLine(GetPen(color ?? _defaultForeground), x, y, x + 0.1F, y);
 		}
 
-		public void DrawPolygon(LuaTable points, int x = 0, int y = 0, Color? line = null, Color? background = null)
+		public void DrawPolygon(LuaTable points, int? x = null, int? y = null, Color? line = null, Color? background = null)
 		{
 			var pointsArr = new Point[points.Values.Count];
 			var i = 0;
 			foreach (LuaTable point in points.Values)
 			{
-				pointsArr[i] = new Point((int)(double)(point[1]) + x, (int)(double)(point[2]) + y);
+				pointsArr[i] = new Point((int)(double)(point[1]) + x ?? 0, (int)(double)(point[2]) + y ?? 0);
 				i++;
 			}