diff --git a/Doxyfile b/Doxyfile
index 3ab9535..52a8cb6 100644
--- a/Doxyfile
+++ b/Doxyfile
@@ -864,7 +864,7 @@ WARN_LOGFILE           =
 # spaces. See also FILE_PATTERNS and EXTENSION_MAPPING
 # Note: If this tag is empty the current directory is searched.
 
-INPUT                  = src doc/index.md
+INPUT                  = src doc/index.md include
 
 # This tag can be used to specify the character encoding of the source files
 # that doxygen parses. Internally doxygen uses the UTF-8 encoding. Doxygen uses
diff --git a/Makefile b/Makefile
index bcb62e8..e1ec4cb 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,6 @@
 MAKEFLAGS="-j $(grep -c ^processor /proc/cpuinfo)"
 CXXFLAGS:=$(CXXFLAGS) -std=c++20 -Wall -Wextra -Werror=switch -Werror=return-type -Werror=unused-result -Wno-maybe-uninitialized
-CPPFLAGS:=$(CPPFLAGS) -Ilib/expected/ -Ilib/ut/ -Ilib/midi/include -Isrc/ -Ilib/bestline/
+CPPFLAGS:=$(CPPFLAGS) -Ilib/expected/ -Ilib/ut/ -Ilib/midi/include -Iinclude/ -Ilib/bestline/
 RELEASE_FLAGS=-O3
 DEBUG_FLAGS=-O0 -ggdb -fsanitize=undefined -DDebug
 CXX=g++
@@ -47,19 +47,19 @@ test: unit-tests
 
 debug: bin/debug/musique
 
-bin/%.o: src/%.cc src/*.hh
+bin/%.o: src/%.cc include/*.hh
 	@echo "CXX $@"
 	@$(CXX) $(CXXFLAGS) $(RELEASE_FLAGS) $(CPPFLAGS) -o $@ $< -c
 
-bin/musique: $(Release_Obj) bin/main.o bin/bestline.o src/*.hh lib/midi/libmidi-alsa.a
+bin/musique: $(Release_Obj) bin/main.o bin/bestline.o include/*.hh lib/midi/libmidi-alsa.a
 	@echo "CXX $@"
 	@$(CXX) $(CXXFLAGS) $(RELEASE_FLAGS) $(CPPFLAGS) -o $@ $(Release_Obj) bin/bestline.o bin/main.o $(LDFLAGS) $(LDLIBS)
 
-bin/debug/musique: $(Debug_Obj) bin/debug/main.o bin/bestline.o src/*.hh
+bin/debug/musique: $(Debug_Obj) bin/debug/main.o bin/bestline.o include/*.hh
 	@echo "CXX $@"
 	@$(CXX) $(CXXFLAGS) $(DEBUG_FLAGS) $(CPPFLAGS) -o $@ $(Debug_Obj) bin/bestline.o bin/debug/main.o  $(LDFLAGS) $(LDLIBS)
 
-bin/debug/%.o: src/%.cc src/*.hh
+bin/debug/%.o: src/%.cc include/*.hh
 	@echo "CXX $@"
 	@$(CXX) $(CXXFLAGS) $(DEBUG_FLAGS) $(CPPFLAGS) -o $@ $< -c
 
@@ -81,7 +81,7 @@ unit-test-coverage:
 	rm -rf bin/debug
 	xdg-open coverage/index.html
 
-doc: Doxyfile src/*.cc src/*.hh
+doc: Doxyfile src/*.cc include/*.hh
 	doxygen
 
 doc-open: doc
diff --git a/README.md b/README.md
index 05240b5..7c51d01 100644
--- a/README.md
+++ b/README.md
@@ -55,7 +55,8 @@ $ make bin/musique
 ├── lib            Zewnętrzne zależności projektu
 │   ├── expected
 │   └── ut
-└── src            Główny katalog z kodem źródłowym
+└── include        Główny katalog z plikami nagłówkowymi
+└── src            Główny katalog z plikami źródłowymi
     └── tests      Katalog z testami jednostkowymi
 ```
 
diff --git a/src/musique.hh b/include/musique.hh
similarity index 100%
rename from src/musique.hh
rename to include/musique.hh