diff --git a/GUI.NET/Forms/frmMain.cs b/GUI.NET/Forms/frmMain.cs
index 91f5c96f..40ae957d 100644
--- a/GUI.NET/Forms/frmMain.cs
+++ b/GUI.NET/Forms/frmMain.cs
@@ -383,6 +383,7 @@ namespace Mesen.GUI.Forms
 				this.frmMain_Resize(null, EventArgs.Empty);
 			}
 			this.Resize += frmMain_Resize;
+			UpdateViewerSize();
 			mnuFullscreen.Checked = enabled;
 		}