diff --git a/makefile b/makefile
index a57f98c..7457506 100644
--- a/makefile
+++ b/makefile
@@ -1,10 +1,10 @@
 CC = gcc
-CFLAGS = -Wall -Wextra -std=c99 -D_POSIX_C_SOURCE=200809L
+CFLAGS = -Wall -Wextra -std=c99 -D_POSIX_C_SOURCE=200809L -Ilib
 LDFLAGS = -ljack -lm -lncurses
 
 all: jack-looper test_engine test_tui test_gui test_cli
 
-jack-looper: main.o engine.o tui.o gui.o
+jack-looper: main.o engine.o tui.o gui.o lib/microui.o
 	$(CC) $(CFLAGS) -o $@ $^ $(LDFLAGS)
 
 test_engine: test_engine.o engine.o
@@ -13,7 +13,7 @@ test_engine: test_engine.o engine.o
 test_tui: test_tui.o engine.o
 	$(CC) $(CFLAGS) -o $@ $^ $(LDFLAGS)
 
-test_gui: test_gui.o gui.o engine.o
+test_gui: test_gui.o gui.o engine.o lib/microui.o
 	$(CC) $(CFLAGS) -o $@ $^ $(LDFLAGS)
 
 test_cli: test_cli.o engine.o
@@ -28,7 +28,10 @@ engine.o: engine.c engine.h
 tui.o: tui.c tui.h engine.h
 	$(CC) $(CFLAGS) -c -o $@ $<
 
-gui.o: gui.c gui.h engine.h microui.h
+gui.o: gui.c gui.h engine.h lib/microui.h
+	$(CC) $(CFLAGS) -c -o $@ $<
+
+lib/microui.o: lib/microui.c lib/microui.h
 	$(CC) $(CFLAGS) -c -o $@ $<
 
 test_engine.o: test_engine.c engine.h
@@ -46,7 +49,7 @@ test_cli.o: test_cli.c engine.h
 .PHONY: all clean test
 
 clean:
-	rm -f *.o jack-looper test_engine test_tui test_gui test_cli
+	rm -f *.o lib/microui.o jack-looper test_engine test_tui test_gui test_cli
 
 test: test_engine test_tui test_gui test_cli
 	./test_engine