diff --git a/Userland/Games/Minesweeper/CustomGameDialog.cpp b/Userland/Games/Minesweeper/CustomGameDialog.cpp
index fd52f439328..60204992484 100644
--- a/Userland/Games/Minesweeper/CustomGameDialog.cpp
+++ b/Userland/Games/Minesweeper/CustomGameDialog.cpp
@@ -34,9 +34,8 @@ GUI::Dialog::ExecResult CustomGameDialog::show(GUI::Window* parent_window, Field
 
 void CustomGameDialog::set_max_mines()
 {
-    // Generating a field with > 50% mines takes too long.
-    // FIXME: Allow higher amount of mines to be placed.
-    m_mines_spinbox->set_max((m_rows_spinbox->value() * m_columns_spinbox->value()) / 2);
+    // NOTE: this is the maximum number of mines possible in a given minesweeper board
+    m_mines_spinbox->set_max((m_rows_spinbox->value() * m_columns_spinbox->value()) - 9);
 }
 
 CustomGameDialog::CustomGameDialog(Window* parent_window)