diff --git a/src/gui/main.cpp b/src/gui/main.cpp
index a9d856c..824d0fb 100644
--- a/src/gui/main.cpp
+++ b/src/gui/main.cpp
@@ -15,6 +15,7 @@ namespace {
 } //unnamed namespace
 
 int main() {
+	using mc::MemoryCard;
 	nana::form frm;
 
 	const MemoryCard mc1(std::ifstream("/home/michele/dev/code/cpp/memoserv/epsxe000_xa2.mcr", std::ios::binary));
diff --git a/src/gui/make_nana_animation.cpp b/src/gui/make_nana_animation.cpp
index bc58666..1627fa2 100644
--- a/src/gui/make_nana_animation.cpp
+++ b/src/gui/make_nana_animation.cpp
@@ -3,8 +3,9 @@
 #include "memcard/icon_fetch.hpp"
 
 namespace duck {
-	AnimationWithSize make_nana_animation (const ConstBlock& block, int width, int height, int fps) {
+	AnimationWithSize make_nana_animation (const mc::ConstBlock& block, int width, int height, int fps) {
 		nana::frameset fset;
+		using mc::icon_fetch;
 
 		for (const auto& frame : icon_fetch(block, width, height)) {
 			nana::paint::image img;
diff --git a/src/gui/make_nana_animation.hpp b/src/gui/make_nana_animation.hpp
index 0a077be..0311b8e 100644
--- a/src/gui/make_nana_animation.hpp
+++ b/src/gui/make_nana_animation.hpp
@@ -2,9 +2,11 @@
 
 #include "animation_with_size.hpp"
 
+namespace mc {
 template <bool> class BasicBlock;
 using ConstBlock = BasicBlock<true>;
+} //namespace mc
 
 namespace duck {
-	AnimationWithSize make_nana_animation (const ConstBlock& block, int width, int height, int fps);
+	AnimationWithSize make_nana_animation (const mc::ConstBlock& block, int width, int height, int fps);
 } //namespace duck
diff --git a/subprojects/memcard/include/memcard/block.hpp b/subprojects/memcard/include/memcard/block.hpp
index 41977fa..a1b5346 100644
--- a/subprojects/memcard/include/memcard/block.hpp
+++ b/subprojects/memcard/include/memcard/block.hpp
@@ -6,6 +6,7 @@
 
 //see: https://www.psdevwiki.com/ps3/PS1_Savedata#Memory_Card_Formats_PS1
 
+namespace mc {
 enum class IconDisplayFlag {
 	NoIcon = 0x00,
 	OneFrame = 0x11,
@@ -63,3 +64,4 @@ inline int32_t calc_icon_count (IconDisplayFlag idf) {
 
 using Block = BasicBlock<false>;
 using ConstBlock = BasicBlock<true>;
+} //namespace mc
diff --git a/subprojects/memcard/include/memcard/icon_fetch.hpp b/subprojects/memcard/include/memcard/icon_fetch.hpp
index f5ca745..2ebbfdd 100644
--- a/subprojects/memcard/include/memcard/icon_fetch.hpp
+++ b/subprojects/memcard/include/memcard/icon_fetch.hpp
@@ -3,4 +3,6 @@
 #include "memcard/block.hpp"
 #include <vector>
 
+namespace mc {
 std::vector<std::vector<char>> icon_fetch (const ConstBlock& block, int width, int height);
+} //namespace mc
diff --git a/subprojects/memcard/include/memcard/memorycard.hpp b/subprojects/memcard/include/memcard/memorycard.hpp
index 25eb0cc..75651a3 100644
--- a/subprojects/memcard/include/memcard/memorycard.hpp
+++ b/subprojects/memcard/include/memcard/memorycard.hpp
@@ -1,12 +1,13 @@
 #pragma once
 
-#include "block.hpp"
+#include "memcard/block.hpp"
 #include <vector>
 #include <iostream>
 #include <cstdint>
 #include <array>
 #include <cstddef>
 
+namespace mc {
 class MemoryCard {
 public:
 	MemoryCard();
@@ -19,3 +20,4 @@ public:
 private:
 	std::vector<uint8_t> m_data;
 };
+} //namespace mc
diff --git a/subprojects/memcard/src/block.cpp b/subprojects/memcard/src/block.cpp
index b932291..ee3847f 100644
--- a/subprojects/memcard/src/block.cpp
+++ b/subprojects/memcard/src/block.cpp
@@ -6,6 +6,7 @@
 
 #define FLOAT_PALETTE_CONV
 
+namespace mc {
 namespace {
 #if defined(FLOAT_PALETTE_CONV)
 	uint8_t _5bit_to_8bit(int n) {
@@ -89,3 +90,4 @@ IconDisplayFlag BasicBlock<Const>::icon_display_flag() const {
 
 template class BasicBlock<true>;
 template class BasicBlock<false>;
+} //namespace mc
diff --git a/subprojects/memcard/src/icon_fetch.cpp b/subprojects/memcard/src/icon_fetch.cpp
index 822be0f..84725fc 100644
--- a/subprojects/memcard/src/icon_fetch.cpp
+++ b/subprojects/memcard/src/icon_fetch.cpp
@@ -6,6 +6,7 @@
 #include <algorithm>
 #include <cmath>
 
+namespace mc {
 namespace {
 	namespace bmp {
 		const uint16_t g_signature = 'B' bitor (static_cast<int>('M') << 8);
@@ -194,3 +195,4 @@ std::vector<std::vector<char>> icon_fetch (const ConstBlock& block, int width, i
 	}
 	return retval;
 }
+} //namespace mc
diff --git a/subprojects/memcard/src/memorycard.cpp b/subprojects/memcard/src/memorycard.cpp
index 172cb90..2a54600 100644
--- a/subprojects/memcard/src/memorycard.cpp
+++ b/subprojects/memcard/src/memorycard.cpp
@@ -4,6 +4,7 @@
 #include <iterator>
 #include <cassert>
 
+namespace mc {
 MemoryCard::MemoryCard() :
 	m_data(8192 * 16)
 {
@@ -33,3 +34,4 @@ ConstBlock MemoryCard::operator[] (std::size_t index) const {
 	assert(index < 15);
 	return ConstBlock(m_data.data() + (index + 1) * Block::size());
 }
+} //namespace mc
diff --git a/subprojects/memcard/src/resize_harris.cpp b/subprojects/memcard/src/resize_harris.cpp
index a9f24d5..75b23f0 100644
--- a/subprojects/memcard/src/resize_harris.cpp
+++ b/subprojects/memcard/src/resize_harris.cpp
@@ -36,6 +36,7 @@
 #include <algorithm>
 #include <numeric>
 
+namespace mc {
 namespace {
 	template <typename T>
 	[[gnu::pure]]
@@ -308,3 +309,4 @@ std::vector<float> blackmanharris_resize (
 
 	return retval;
 }
+} //namespace mc
diff --git a/subprojects/memcard/src/resize_harris.hpp b/subprojects/memcard/src/resize_harris.hpp
index d178eb5..f6936a2 100644
--- a/subprojects/memcard/src/resize_harris.hpp
+++ b/subprojects/memcard/src/resize_harris.hpp
@@ -2,6 +2,7 @@
 
 #include <vector>
 
+namespace mc {
 std::vector<float> blackmanharris_resize (
 	int in_w,
 	int in_h,
@@ -9,3 +10,4 @@ std::vector<float> blackmanharris_resize (
 	int out_w,
 	int out_h
 );
+} //namespace mc