diff --git a/src/BizHawk.Client.EmuHawk/tools/GB/GBGPUView.cs b/src/BizHawk.Client.EmuHawk/tools/GB/GBGPUView.cs
index ec76160c67..6439095ee1 100644
--- a/src/BizHawk.Client.EmuHawk/tools/GB/GBGPUView.cs
+++ b/src/BizHawk.Client.EmuHawk/tools/GB/GBGPUView.cs
@@ -356,6 +356,9 @@ namespace BizHawk.Client.EmuHawk
 			int* pal = (int*)_pal;
 			byte* oam = (byte*)_oam;
 
+			// clear out the old sprite data
+			Win32Imports.MemSet(lockData.Scan0, 0xff, (uint)(lockData.Height * lockData.Stride));
+
 			for (int s = 0; s < 40; s++)
 			{
 				int yPos = *oam++;
@@ -545,7 +548,6 @@ namespace BizHawk.Client.EmuHawk
 				bmpViewOAM.Refresh();
 
 				// oam (objects)
-				bmpViewOBJ.Clear();
 				DrawObj(bmpViewOBJ.Bmp, oam, vram, spPal, lcdc.Bit(2), _cgb);
 				bmpViewOBJ.Refresh();
 			}
@@ -979,7 +981,7 @@ namespace BizHawk.Client.EmuHawk
 
 		private void bmpViewOBJ_MouseMove(object sender, MouseEventArgs e)
 		{
-			SpriteMouseover(e.X, e.Y);
+			// TODO: pick out sprites from the object window based on their position
 		}
 
 		private void bmpView_MouseClick(object sender, MouseEventArgs e)