diff --git a/src/gui/main_window.cpp b/src/gui/main_window.cpp
index 7dddab6..f473e83 100644
--- a/src/gui/main_window.cpp
+++ b/src/gui/main_window.cpp
@@ -56,8 +56,10 @@ void MainWindow::open_file_from_dialog() {
 		auto& mc = m_memcards.back();
 		auto& grid = m_grids.back();
 		for (int z = 0; z < 15; ++z) {
-			if (mc[z].has_magic())
-				grid.emplace_back(duck::make_nana_animation(mc[z], m_icon_size, m_icon_size, m_icon_fps));
+			auto block = mc[z];
+			for (std::size_t n = 0; block.has_magic() and n < block.block_count(); ++n) {
+				grid.emplace_back(duck::make_nana_animation(block, m_icon_size, m_icon_size, m_icon_fps));
+			}
 		}
 		(*this)["slots"] << m_grids.back();
 	}
diff --git a/subprojects/memcard/include/memcard/block.hpp b/subprojects/memcard/include/memcard/block.hpp
index 8e5e17f..4f7e47e 100644
--- a/subprojects/memcard/include/memcard/block.hpp
+++ b/subprojects/memcard/include/memcard/block.hpp
@@ -72,7 +72,7 @@ public:
 	std::vector<uint8_t> icon_palette() const;
 	bool has_magic() const;
 	IconDisplayFlag icon_display_flag() const;
-	int block_count() const;
+	std::size_t block_count() const;
 	std::size_t index() const { return m_index; }
 	std::string title() const;
 	std::size_t available_blocks() const;
diff --git a/subprojects/memcard/src/block.cpp b/subprojects/memcard/src/block.cpp
index 18c27cf..99f9eb7 100644
--- a/subprojects/memcard/src/block.cpp
+++ b/subprojects/memcard/src/block.cpp
@@ -163,7 +163,7 @@ IconDisplayFlag BasicBlock<Const>::icon_display_flag() const {
 }
 
 template <bool Const>
-int BasicBlock<Const>::block_count() const {
+std::size_t BasicBlock<Const>::block_count() const {
 	return frame(0)[3];
 }