diff --git a/ShareX.HelpersLib/Controls/MyPictureBox.cs b/ShareX.HelpersLib/Controls/MyPictureBox.cs
index 8bec738d7..3994cff95 100644
--- a/ShareX.HelpersLib/Controls/MyPictureBox.cs
+++ b/ShareX.HelpersLib/Controls/MyPictureBox.cs
@@ -331,7 +331,9 @@ private void MyPictureBox_MouseDown(object sender, MouseEventArgs e)
         {
             if (FullscreenOnClick && e.Button == MouseButtons.Left && IsValidImage)
             {
+                pbMain.Enabled = false;
                 ImageViewer.ShowImage(Image);
+                pbMain.Enabled = true;
             }
         }